Category Archives: Trees

North Dakota’s Pitiful and Yet Amazing Forest

Jared and Nathan Lawrence of Good News Tree Services, Inc. exploring a North Dakota forest.

God bless North Dakota. This state has a bleak and somewhat forlorn majesty and beauty of its own, although sometimes you have to look below the surface to find it. But trees, due to the lack thereof, are not this state’s crowning glory, and the trees that are here have little to boast about compared to their glorious cousins that inhabit the lofty mountains and verdant valleys of the western regions of the Pacific Northwest.

In all reality, it seems that North Dakota has more bent, tilting, and clanking farm windmills, more lifeless, and rusting century-old threshing machines sleeping silently out in farmers’ fields along with countless grain silos standing as sentinels over railroad tracks, as well as abandoned and derelict barns and houses than it has trees trees. So when I discovered that the Minot area of north central North Dakota, just below the Canadian border, where I am visiting family, had an experimental forest and an arboretum, this tree geek arborist had to check it out.

Forest and arboretum, I mulled in my mind. Naturally this Oregon native conjured up park-like images in his fertile imagination.

Flat, open farmland in North Dakota. Yes. Treed forests? Not so much.

To get to this forest, we had to drive for miles through endless, virtually treeless fields of wheat, soybean, rapeseed, flaxseed and sunflower along with pastures speckled with sheep and cattle sprawling across the pancake flat landscape as far as the eye could see, while traveling at 70 miles per hour on a straight, virtually carless highways that reached to the horizon. The only trees, for the most part, were the phalanx like windbreaks planted around the occasional lone farmhouse to shield it from the howling winds and the searing summer heat. The landscape also boasted, if you can call it that, a few thirsty trees growing along the fringes of a few creeks and watersheds here and there, and along old fence lines where birds have perched and deposited tree seeds. After all of this, we finally reached the Denbigh Experimental Forest.

As a native Pacific Northwesterner, who has spent a lifetime tramping up and down in our coastal and Cascade Mountains, I wasn’t sure what to expect in North Dakota where there are probably more honking Canada geese grazing in wheat fields than trees.

My initial response was: “This is it??? This is what they call a forest?”

The Denbigh Experimental Forest in northwestern North Dakota east of Minot.

We exited our car and hit a hiking trail. Immediately the forest floor was littered with the carcasses of countless trees that had succumbed to the pitiless ravages of the fierce climate and harsh growing conditions that this region offers its flora. Many more trees were standing lifeless or were half dead. The fierce plains winds had knocked countless trees down. Many more were leaning precariously against their neighbors for support, creaking eerily in the wind as they rubbed themselves raw against one another. After nearly a hundred years, few trees were more than 60 feet tall and a foot or two in diameter. In western Oregon from where I come, trees of this age would be more than twice as tall and thick. Needless to say, I was not impressed, to say the least.

But I had come this far to see said forest, so I was determined to discover something unique and wonderful about it. I refused to be put off by its shabby and pitiful outward appearance.

And sure enough, I was in for a pleasant surprise. You’d think by now, at my age, I’d have learned not to judge a book by its cover.

Yes, on the surface, what I found, in all honesty, was the about the saddest forest I had ever seen in my life of traveling in some 22 countries on four continents. Yet, it was still a forest, and in my book, this is something still to be cherished and even respected. Again, it might take some creative searching, but I was hopefully predetermined to find something special here.

Some of the more stately trees in this forest include Scotch pine and aspen.

The Denbigh Experimental Forest was established by the USDA Forest Service in 1931 “to determine which trees could survive and thrive in the harsh northern Great Plains climate,” says the brochure at the forest’s parking lot kiosk. Sadly, in its past life, this 636 acre site had been “extensively over-plowed and overgrazed during the early part of the 20th century, leaving wind-blown sand dunes”, according to Wikipedia. As a result of man’s mismanagement, it had become a wind-blown, eroded and forsaken dust bowl.

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Exploring the Art of Japanese Niwaki-Style Pruning

This is an example of a Street of Dreams Japanese garden created by the renowned Japanese landscape designer Hoichi Kurisu that Good News Trees Service, Inc. of Wilsonville has been maintaining for more than 20 years for three different home owners.

Are you frustrated with all of your shrubs being sheared into boring geometric shapes—spheres, ovals, rectangles—or left to grow in a tangled, misshaped mess? How about looking to the East—all the way to Japan—for some inspiration to revitalize your garden?

When you think of a Japanese garden, what comes to mind? Probably pagoda lanterns, pine trees and Japanese maples pruned in a curiously artful manner, and water features including koi ponds, waterfalls and meandering streams. If you find this appealing, have you considered bringing some of these elements into your own garden in the way that you prune your shrubs and trees? Then consider niwaki.

The Japanese word niwaki simply means “garden trees.” The art of the Japanese niwaki pruning style involves coaxing out of a tree those features believed to signify the essence of a tree including its gnarled trunks, outstretched branches and rounded canopies (Niwaki—The Pruning, Training and Shaping of Trees the Japanese Way, p. 9, by Jake Hobson). 

Niwaki is similar to the art of bonsai pruning, with which most people are familiar, except not in a miniaturized form, but involving full-sized trees. Many of the bonsai pruning techniques can be applied to the larger trees and shrubs in the garden but on a grander scale and, obviously, without the same attention to minute detail. Therefore, you can lose the mini-pruners, tweezers and scissors.

In the niwaki pruning style, trees are often made to look older than they really are by encouraging a broad trunk supporting gnarled and drooping branches, and by giving them a more open and attractive appearance so that the structure or architecture of the tree is visible through the foliage. Trees can be made to imitate windswept or lightning struck trees in the wild, which also gives them the appearance of age (A Practical Guide to Japanese Gardening, pp. 240–241, by Charles Chesshire). 

Both the bonsai and niwaki styles of  pruning attempt to replicate mature trees—some hundreds of years old—as they appear in nature after having endured the rigors of time including weather, pests and adverse growing conditions. We often see such trees clinging to cliffs overhanging the ocean’s shoreline, or in windswept canyons and gorges, or perched high on a mountain side. It is also not uncommon to see such gnarled trees in ancient forests, or growing in an open meadow. In all of these scenarios, time and gravity have caused the trees’ branches to naturally sag gracefully, and as the weaker branches get shaded out by the stronger and larger ones, the trees develop a naturally layered look. When we see such a tree, we are inspired by its character, beauty, symmetry or asymmetry and overall appearance of antiquity, stability and permanence. We sometimes even poetically attribute human characteristics to such trees such as wisdom, grace, dignity and nobility. 

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Nathan’s Best Picks for Columnar Street Trees

By Nathan Lawrence—ISA Cerified Arborist, OSU Master Gardener and owner of Good News Tree Service, Inc. at GoodNewsTree.com in Wilsonville, Oregon

The following is my list of the best street trees for small front yards that have space for only narrow, non-spreading street trees. All of these trees grow well in the western valleys of the Pacific Northwest, are not messy, and have little or no problems with diseases based on my decades of experience as a tree care provider and plant health care expert. You can search online for photos of these trees to see what they look like.

  • Dogwood—Hybrid White Dogwood (Cornus ‘Eddie’s White Wonder’): This unusual hybrid is a cross between our native Western dogwood, Cornus nuttallii, and the Eastern North American species, Cornus florida. The large (four inch diameter), bold flowers open in early spring and have broad overlapping bracts (false petals) that are gleaming white and abundant against a dark green foliage making for a striking display. The tree has a narrow, upright and rather pyramidal in form, with slightly drooping branching. It has shown resistance to dogwood anthracnose, a common foliage disease. This tree grows to height of 20 to 30 feet and a width of 15 to 20 feet. The leaves turn reddish pink in the autumn and small red berries decorate its branches in the winter. The tree can tolerate full sun to partial shade.
  • Dogwood—Starlight Dogwood (Cornus x nuttalii ‘Starlight’): A close relative to Venus is the variety Starlight® which is the result of crossing Korean dogwood with the Pacific dogwood. 35 feet high and 20 feet wide Resistant to anthracnose. Abundance of 4-5” creamy white flowers create a showy spring display against its deep green foliage. Orange strawberry-like fruit in early fall, followed by a show of red fall color. Resistant to anthracnose. Full sun to partial shade; size 25-30 feet tall by 15-20 feet wide.
  • Ginkgo—Sky Tower Ginkgo (Ginkgo biloba ‘JN9 Sky Tower’): Rich green foliage. Narrow crown. Brilliant yellow fall color. Height 20 feet by 6 feet wide. Make sure you plant only male trees. Female trees produce a messy and nasty-smelling fruit.
  • Hornbeam—American Hornbeam (Carpinus caroliniana): This North American native grows to about 30 feet tall and 20 feet wide. It is slow-growing, deciduous, small to medium-sized with an attractive globular form. It prefers moist soil and is not drought tolerant.
  • Hornbeam— (Carpinus Lucus pyramidal): Narrow, slender growing habit. Dense canopy. 16 to 18 foot height. Attractive yellow, green catkins in the spring.
  • HornbeamUpright European Hornbeam (Carpinus betulus ‘fastigiata’): Dense green foliage with golden fall color. Height 40 feet and width 20 feet.
  • Maple—Crimson Sentry (Acer platanoides ‘Crimson Sentry’): This tree grows to a height of 25 feet and width of 15 feet. It has purple leaves, which turn maroon to reddish bronze leaves in the fall. Oregon State University says of this tree, “In western Oregon the trees appear rather susceptible to powdery mildew, a fungal disease. This is especially noticeable in mid-to-late-summer. The affected leaves become a dull maroon color followed by a white-gray color, as if dusted with powdered sugar. One authority suggested that Crimson Sentry™ should not be recommended for mass or street plantings ‘unless a ghostly pallor on purple foliage is actually wanted.’”
  • Maple—Karpick Red Maple (Acer rubrum ‘Karpick’): This columnar red maple grows to a height of 45 feet tall and 20 wide with red-orange foliage in the fall.
  • Oak—Columnar English Oak (Quercus robur ‘Fastigiata’) and Crimson Spire Oak (Quercus robur x Q. alba ‘Crimschmidt’): These trees are slow to moderate growing reaching a height of 50 to 60 feet tall and 15 to 20 feet wide. They prefer full sun and well-drained soil. They are extremely adaptable and very tolerant of urban conditions. The trees tolerate drought, but do best with occasional irrigation.
  • Oak—Pacific Brilliance Pin Oak (Quercus palustris ‘Pacific Brilliance’): The crown height is 50 feet and the crown spread is 20 to 25 feet at maturity.
  • Paperbark Maple (Acer griseum): This tree grows to a height of 20 to 30 feet and width of 12 to 20 feet. Its crown is oval to oval rounded. Tree is noted for its unique copper orange to cinnamon reddish brown peeling bark and its showy orange to red colored leaves in the fall.
  • Stewartia—Japanese Stewartia (Stewartia pseudocamellia): This slow-growing tree grows to crown height of 12 to 40 feet and a crown spread 10 to 25 feet with white camellia-like flowers that bloom in the late spring. Several smaller varieties of stewartia are available too (e.g. Korean stewartia [Stewartia koreana] and tall stewartia [Stewartia monadelpha]).
  • Tupelo, Afterburner (Nyssa sylvatica ‘David Odom’): This tree grows moderately fast to a height of 35 feet and a crown spread of 20 feet. The shape of its crown is upright and pyramidal to oval and is symmetrical and uniform. Its high gloss foliage is bright green tuning bright red in the fall. It has a blue-black berry-like fruit that’s less than a half-inch in size.

June in the Garden—A To Do List

This guide is tailored for the western valleys of Oregon and Washington

YOU can help to make the world a better, a more friendly, loving and beautiful place by being a good steward of the spot on this earth, your garden, that you have been given the privilege of borrowing for a time. It is our hope that the following to-do list will help you to do just that.

Nathan, the Treevangelist, urges you to treat your spot on this planet like your own personal Garden of Eden. May it become your personal paradise. This is your divinely mandated responsibility.  Your trees, shrubs, flowers and the wildlife in your yard will pay you back as they express their smiling appreciation to you and yours by radiating their love, joy and beauty bursting forth with vibrant and verdant life. Below is a to-do list to help fulfill this mission.

Yikes, with a record dry April and lower than normal rainfall in May, it would be wise to budget a little extra dough for your higher than usual upcoming watering bill. Beyond this,  June is like a teenager wanting to become an adult as summer tugs at spring wanting it leave its adolescent tantrums and mature into stable and fruitful adulthood. This tug of war is characterized by sudden violent outbreaks of wind squalls followed by intermittent outbursts of petulant rain showers followed by parting clouds and bright blue skies followed by more showers and a few angry claps of thunder and lightning followed by more sun and the cycle continues until kid spring grows up and becomes Mr. Summer. All the while, spring’s teenage growth hormones are raging in nature as the grass grows twice as fast along with the weeds and everything else in the garden.  All the plants wanted and unwanted thrive in these  optimal growing conditions of warm nights, plentiful rain and cool yet sunny days. Your neat winter, manicured yard now resembles a tropical jungle that must be tamed with shears and pruners. Welcome to summer!

While you’re at it, take a few moments and scroll back through this same Good News Tree Service, Inc. blog and check out the archives for any tree and plant care articles that you may have missed. Also check out our YouTube channel at https://www.youtube.com/channel/UCvcu2lL9NpgoXQtUFYyQShw, our Facebook page at https://www.facebook.com/GoodNewsTreeService/ and our main website at https://goodnewstree.com. Please enjoy!

Readers’ suggestions on how to improve this list are gladly solicited. If you, the reader, have any suggestions for additions to this month’s list, please put them in the comments section of this article, and I will add them to the list. Thank you in advance! — Nathan

Tree and Shrub Care

  • Birch trees. Thanks to the bronze birch borer beetle, a large number of the Pacific Northwest birch trees are dying. To make your tree less hospitable to this nasty and lethal pest, there are two inexpensive things you can do. First, apply several inches of mulch to the ground under the canopy of your birch tree. Second, with a whirly-bird sprinkler, irrigate the area under the birch’s canopy. The more water the better, since birches are water-loving trees. Irrigate once a week for several hours during warm weather and twice during hot weather. These two actions will lessen the chances that the beetle will attack and kill your birches.
  • Hedges. Shear after spring growth and before hot weather. Shearing during hot weather may result in sun scald of foliage.
  • Maples (including Japanese maples). Monitor the leaves of all maples and other trees and shrubs for symptoms of the potentially lethal verticillium wilt fungal disease. If you see branch dieback, call us.
  • Mulch: Apply two to three inches of mulch around all trees and ornamental shrubs. This helps to fertilize the plants and feed the soil, and also protects them against weed growth and loss of water when the warmer  weather returns.
  • Ornamental shrub pruning. Be careful not to do major pruning during periods of hot weather, since doing so exposes tender leaves underneath that haven’t acclimated to the sun’s ultraviolet rays yet, since they have been shielded by the layer of leaves you’ve just removed by pruning. Sun scald of these tender leaves may occur, especially on southern and  southwestern sides of the plant. Sun scalded leaves won’t kill the plant, but it looks unsightly. 
  • Pine tree pruning. Don’t do major pruning of pine trees during the growing season, since this attracts sequoia pitch moth infestation.
  • Pruning of large trees. Most trees in the temperate western valleys of Oregon and Washington can be pruned anytime of the year. If you’re not sure what to do, or how to do it, call Good News Tree Service, Inc. for a consultation, pruning lessons or to have them do the pruning for you.
  • Prune fast growing ornamental shrubs that are beginning to look shabby. You may need to prune them again in the early summer for a more neat and manicured look. 
  • Tree and shrub removal and stump grinding can be done all year long. 
  • Trees. Have an ISA Certified Arborist with an ISA Tree Risk Assessment Qualification (like Good News Tree Service, Inc.) inspect your large trees for the potential of failure due to weak root systems and defects in trunks and branches. This can be done anytime of the year.
  • Rhododendrons. Remove old blooms (called “dead heading”). Though it  looks better aesthetically to remove the dead blooms, it doesn’t hurt the plants to leave them on.
  • Watering trees and shrubs. During the hot summer months, well established trees and larger ornamental shrubs usually need little or no watering. Keep your eye on them, however, since due to dry soil conditions brought on by the moderate but prolonged drought we are experiencing in this region, this may put your large trees under abnormal stress. Signs of stress include wilting, excessive needle and leaf drop, yellowing of foliage and pitch seeping out of tree trunks (especially conifers). Extra water to the root zones of these stressed trees during hot weather is the key to relieving stress from drought and preventing their demise.
  • Newly planted trees and shrubs will need watering for the first two to three summers until their roots get established. Regular lawn irrigation isn’t sufficient to give trees and shrubs the deep watering they need to survive the summer heat. During warm weather, deep water your new plants at least once per week. During hot weather, twice per week.

Plant Health Care

  • Aphids. If aphids are a problem, there are a variety of ways to effectively control this pesky insect that drops its sticky honeydew excrement all over vehicles and hard surfaces. Ask Good News Tree Service, Inc. for solutions to your aphid problems.
  • Arborvitae twig blight. Spray in the spring and early summer when new growth starts at two week intervals.
  • Bronze birch borer. Treat any time this month. If your birch trees are dying, it is likely because of this pest. Treatments are available and effective , but expensive. Trees can be effectively treated from mid-May through June. 
  • Dogwood anthracnose. If you missed spring foliar spraying, can use treat with a systemic fungicidal basal bark spray (available through a licensed commercial pesticide applicator). Symptoms of this foliar fungal disease include brownish, reddish purplish leaf spots getting increasingly larger as the summer draws on until many leaves are no longer predominantly green.
  • Deep root fertilization. Trees and ornamental shrubs—deep root fertilize to promote lush, healthy-looking and vigorous crown growth. Urban soils tend to lacking in many of the nutrients that trees and shrubs need to survive. Many are malnourished or are starving to death, which is why they don’t look radiantly healthy are struggling with pest issues. Deep root fertilization helps to promote healthy-looking and pest-resistant trees and shrubs. The best time of the year to do this is in the spring and fall.
  • Monitor trees and shrubs for insect pests, Piercing and sucking plant pests (e.g. aphids, lacebugs, scales, weevils, mites, etc.) are now out and active. If major infestation occurs, plan a course of action to treat your trees and shrubs against these pests. Small numbers of piercing and sucking insects are not harmful to plants. In fact, they provide food for the beneficial, predatory insects that feed on them. To control harmful insects, one can apply systemic insecticides against piercing sucking insects (aphids, lacebugs, scales, weevils, etc.) via soil injections (one treatment gives season-long control). If applied according to label directions, this will kill only the harmful and not beneficial insects.
  • Spider mites will start to become active as the weather warms. Systemic insecticides are available against this pest.
  • Tent caterpillar. Apply systemic pesticide for season-long control.
  • Verticillium wilt. You can still treat trees for this soil born fungal pathogen during the summer, but fall is the best time to treat, and spring is the second  best time. Maples are especially plagued by this disease. During hot weather, symptoms include smaller than normal cupped leaves in the upper canopy, often with the death of the entire branch occurring.

Elsewhere in the Garden

  • Slugs and snails. Put slug bait around your flowers and tender perennials like hostas. 
  • Mulch. Apply two to three inches of mulch (e.g. bark dust, garden compost or wood chips) on all of your shrub beds. Covering bare dirt areas in your yard with mulch helps to prevent soil compaction from rains, and weed growth, and helps to enrich our heavy clay soils.
  • Flowers. Continue planting annual and perennial flowers. Water and fertilize annuals and perennial flowers. The hotter the weather, the more water they will need. Flowers in pots and hanging baskets dry out especially quickly, and so need watering every day or two.
  • Ivy. Cut English ivy off of the base of trees. (This can be done any time of the year.)
  • Backyard birds feeding. Don’t stop feeding the birds even during the spring and summer seasons. Dutifully maintain your bird feeders. Why? Even though we’re now past the winter season and there is more food available for the birds, having these feathery friends frequent your garden serves several purposes. First, they bring life and excitement to your backyard by turning it into a bird sanctuary. Second, your singing friends will thank you for your generosity by providing you with hours of entertainment, and by eating insect pests that harm your ornamental trees and shrubs. So bring life and excitement to your backyard by turning it into a bird sanctuary.  
  • Vegetable garden. Start making plans for your vegetable garden. Once the soil has dried out, you can begin working it for planting our veggies. Usually this will occur in late April or early May and sometimes later depending on the weather. The earlier you plant, the sooner you’ll be feeding on delicious veggies from your own garden! 
  • Planting trees and shrubs. This is a good time of the year to plant trees and shrubs. Visit your local nursery and select your favorite ornamental shrubs and shade trees. After planting your new shrubs, just make sure that you water them well immediately and regularly subsequently for the first two or three summers until their roots get established. During warm weather (in the 60s to low 80s), deep root water once per week. During hot weather (mid-80s and higher) deep root water at least twice per week.
  • Fertilizing shrubs. Fertilize your ornamental shrubs with a slow release fertilizer. If the shrubs have a layer of barkdust or other mulch around them, rake the mulch away and apply the fertilize to the bare dirt, so that it actually reaches the plant’s root zone.

Rose Care

  • Late spring, summer and into early fall: During prolonged warm, dry weather, deep root water your roses at least once a week. A rose needs five gallons of water per plant per week.
  • As needed, remove spent flowers after they are done blooming.
  • End of June: Fertilize roses again.
  • During hot summer weather: Spray roses with water (not in the morning, though) to cool them down, and spray top and undersides of leaves to wash off pests such as spider mites and aphids.

Lawn Care

  • Lawn grubs. If lawn grubs are an issue in your lawn, prevent further damage by applying a grub-control product that continues to work throughout the season. The best time to do this is while doing lawn maintenance activities in early June.

Pacific Northwest Lawn Care Month-by-Month (Western Valleys)

March Through May

  • Feed the wild birds. Attracting wild birds to your garden is an excellent way to naturally control harmful insects. Allow wild birds such as starlings to peck at your grass as they are feeding on insects that are harmful to your lawn.
  • Irrigation systems. Check your irrigation system well before the warm weather starts to ensure that there are no broken pipes, faulty sprinkler heads or broken risers. Check sprinkler heads for adequate coverage and adjust or replace as necessary. Check your timer to make sure it is functioning so that expensive water wastage does not occur. Have your irrigation backflow prevention device tested. In some cities, this a yearly requirement.
  • Get your mower ready. Perform mower maintenance.Take your mower into repair shop to perform annual engine maintenance and blade sharpening. Do it early in the season when the repair shops are not busy and to avoid the spring rush, so that you will not be delayed in mowing your grass in the spring.
  • Dethatch your lawn. Once your lawn has dried out and it is not excessively wet—usually in April or May—dethatch your lawn of old roots and stems. Rake and remove the thatch. Lawn dethatchers can be rented  or your gardener can perform this service.
  • Aerate compacted soil. Lawn soil becomes compacted due to human and pet traffic as well as rainfall thus hindering water and fertilizer penetration and the growth of grass roots. This is why it is wise to aerate your lawn occasionally—preferably annually—for the best looking and most healthy lawn. Lawn aerators can be rented or your gardener can perform this service.
  • Remove perennial weeds. Once the grass starts to grow and on a dry day, spot treat weeds with an herbicide. Read and follow all label directions including wearing the recommended personal protection equipment (or PPE) when applying chemicals herbicides. At any time of the year, you can dig out the weeds by hand.

April or May

  • Overseed bare spots. When the weather begins to warm up, but are not too hot and there is still regular rainfall, and when the grass begins to grow, it is an excellent time to overseed bare or thin spots in your yard. Fall is the best time of the year to reseed bare areas of your lawn, while spring is the second best time.
  • Start mowing. Begin to mow your grass every week or as needed. For the best results, do not remove more than one-third of the top growth of  your grass at a time. Grass can be kept shorter during cooler weather, but when the hot summer weather begins, it is less stressful on the grass to allow it to remain at about two to three inches tall. This also helps the grass to choke out any weeds that might try to grow up through it.
  • Weed control. Annual weeds, such as crabgrass, grow from seed each spring. A well-timed application of preemergence herbicide to stop them from growing is called for at this time of the year. A good guideline is to spread the preemergence herbicide as forsythia blooms in your area start to drop.
  • Fertilization. Feeding your lawn at least couple of times a year is a must. One fertilization in the spring and one again in the fall is the minimum requirement to maintain a healthy lawn. 

June

Lawn grubs. If lawn grubs are an issue in your lawn, prevent further damage by applying a grub-control product that continues to work throughout the season. The best time to do this is while doing lawn maintenance activities in early June.

July Through September

  • Summer lawn maintenance. Summer is about mowing, watering, and pest control. Stay on top of mowing for a healthy lawn.
  • Irrigation. Water deeply, slowly and as infrequently as possible. Try to avoid watering established lawns more than two or three times per week if possible except during extremely in hot conditions. It is not a bad idea to let the soil under your grass to dry out for a short time in between watering as this forces the grass roots to grow deeper in search of water thus making for a more drought tolerant lawn. It is best not to rely on timers for irrigation as temperatures will dictate water needs in addition to lack of rainfall. However, timers are helpful if you have lawns areas that are to large to micromanage or you will be gone for a period of time. 
  • Mowing. Mow once a week, removing no more than one-third of the height of the grass to avoid stressing it. Mow regularly to prevent weed seed spread.
  • Letting your lawn go dormant. If you want to save on your water bill during the summer months, you can skip watering your lawn if you don’t mind it turning brown. It is not dead; it is merely sleeping or in a dormant state. When the rains start up again in the fall, your lawn will turn green and start growing again. 

Fall

  • Weed control. Most perennial lawn weeds are more easily killed in the fall. Treat them with a broadleaf herbicide or pull them by hand.
  • Fertilization. If you only fertilize as part of your lawn maintenance once a year, fall is the best time to do it. In fact, your lawn will appreciate a light application of fertilizer in early autumn and again in late autumn.

September

  • Fertilization. When rains begin, fertilize with natural organic or slow release formulations. 
  • Lawn renovation. Late in the month, begin fall renovation including thatching and aerating if you were unable to do it in the spring. Rake and overseed bare spots, or install new seed or sod lawns.
  • Irrigation. As the cool weather begins, you can reduce the amount of lawn watering. Eventually, when the weather becomes cool enough and the fall rains start, you can stop watering and shut off  your irrigation system if you have one. Before winter, drain your irrigation system to prevent it from freezing.
  • Late-September Through Early November
  • Overseed bare spots. When the weather begins to cool down from the summer heat, yet while the grass is still growing, and the fall rains begin is an excellent time to overseed bare or thin spots in your yard. Fall is the best time of the year to reseed bare are of your lawn, while spring is the second best time.

November

  • Fertilization. Late in the month, apply winter fertilizer which is vital to maintain healthy turf. 
  • Mowing. Continuing mowing as needed while the grass is still growing if conditions are not excessively wet and cold.

December

  • Fertilization. Apply winter fertilizer if you forgot to fertilize your lawn the fall.  
  • Rake leaves. What more can be said about this?

December Through March

  • Perform mower maintenance. This is a good time to take your mower to repair shop for some annual engine maintenance and blade sharpening. Do it in the winter when the repair shops are not busy and to avoid the spring rush so that you will be ready to mow your grass in the spring.
  • Other lawn care. Avoid walking on extremely soggy or heavily frost-covered lawns to avoid damage to your grass.

May in the Garden—A To Do List

This guide is tailored for the western valleys of Oregon and Washington

YOU can help to make the world a better, a more friendly, loving and beautiful place by being a good steward of the spot on this earth, your garden, that you have been given the privilege of borrowing for a time. It is our hope that the following to-do list will help you to do just that.

Nathan, the Treevangelist, urges you to treat your spot on this planet like your own personal Garden of Eden. May it become your personal paradise. This is your divinely mandated responsibility.  Your trees, shrubs, flowers and the wildlife in your yard will pay you back as they express their smiling appreciation to you and yours by radiating their love, joy and beauty bursting forth with vibrant and verdant life. Below is a to-do list to help fulfill this mission.

Despite the fact that last month was our driest on record, the April showers that did not happen still brought forth May flowers. The cycles of nature are amazingly irrepressible. At this time of the year, nature puts on her finest adornments to regale the pollinators with tasty enticements to ensure the survival of the species. The most dour personality is sure to have their spirits lifted just by stepping outside and imbibing in the bright blue of the sky, the multiple shades of green and crimson foliage, along with the fascinating and captivating array of floral colors. Get outdoors and immerse yourself in it all—get intoxicated with the sights and fragrances along with the sounds of the mellifluous  birds. For a moment, let’s forget about the craziness of the world around us and say a prayer of thankfulness that sanity, consistency and predictable order still prevails in the garden. This can be great solace to the  wearied soul, to be sure!

While you’re at it, take a few moments and scroll back through this same Good News Tree Service, Inc. blog and check out the archives for any tree and plant care articles that you may have missed. Also check out our YouTube channel at https://www.youtube.com/channel/UCvcu2lL9NpgoXQtUFYyQShw, our Facebook page at https://www.facebook.com/GoodNewsTreeService/ and our main website at www.goodnewstree.com. Please enjoy!

Readers’ suggestions on how to improve this list are gladly solicited. If you, the reader, have any suggestions for additions to this month’s list, please put them in the comments section of this article, and I will add them to the list. Thank you in advance! — Nathan the Treevangelist

Tree and Shrub Care

  • Mulch. Apply two to three inches of mulch around all trees and ornamental shrubs. This helps to fertilize the plants and feed the soil, and also protects them against weed growth and loss of water when the warmer  weather returns.
Coast pine with new growth showing male pines and pollen.
  • Pine tree pruning. Don’t do major pruning of pine trees during the growing season, since this attracts sequoia pitch moth infestation.
  • Pruning of large trees. Most trees in the temperate western valleys of Oregon and Washington can be pruned anytime of the year. If you’re not sure what to do, or how to do it, call Good News Tree Service, Inc. for a consultation, pruning lessons or to have them do the pruning for you.
  • Prune fast growing ornamental shrubs that are beginning to look shabby. You may need to prune them again in the early summer for a more neat and manicured look. 
  • Reparative pruning. Repair winter damaged to trees and shrubs.
  • Tree and shrub removal and stump grinding can be done all year long. 
  • Trees. Have an ISA Certified Arborist with an ISA Tree Risk Assessment Qualification (like Good News Tree Service, Inc.) inspect your large trees for the potential of failure due to weak root systems and defects in trunks and branches. This can be done anytime of the year.
Close up of a pink Rhododendron Flower
  • Rhododendrons. Remove old blooms (called “dead heading”). Though it  looks better aesthetically to remove the dead blooms, it doesn’t hurt the plants to leave them on.
  • Water trees and shrubs as necessary, even before the summer heat starts. This geographical region has entered a period of erratic rain patterns, so even during the typically consistent rainy winter and spring seasons, due to the long periods of dry weather, some tree and shrubs will need extra water. Vigilance is the key. Watch your plants for signs of drought stress, and then give them a drink of water as needed.

Plant Health Care

Good News Tree Service, Inc. provides full plant health care services as listed below.

  • Apple scab on ornamental crabapple and fruiting apple trees. The first visible symptoms occur on leaves in spring as pale, yellowish, water-soaked spots the size of a pinhead. These enlarge, becoming darker and smoky in appearance, later taking on an olive shade and ultimately a brownish black color. Spots may be any shape but are frequently circular. Young infections often show a radiating spread of fungal tissue through the leaf, and such areas later appear as irregular, brown-colored infections. Diseased leaves can be curled and distorted and often drop early. This fungal disease can also move into the fruit to produce a scabby effect, hence the name “apple scab.” Several fungicidal sprays are required to control this disease just prior to flowering and after flowering. 
  • Arborvitae Twig Blight: Spray in the spring and early summer when new growth starts at two week intervals. 
  • Bronze Birch Borer: Begin treating in mid-May through June. This is the only time of year that this beetle can be effectively controlled.
  • Cherry Leaf Spot: Spray cherry trees for leaf spot. Apply first spray at petal fall and two weeks later.
  • Cherry Tree Brown Rot Blossom Blight (Monilinia fructicola):Make 3 foliar applications starting at bud break and at 14 day intervals.
  • Coryneum Blight (Shot Hole Fungus) or Cherry Leaf Spot: This leaf blight affects ornamental and flowering cherry, plum and prune trees. Spray at petal fall, shuck fall and two weeks later.
  • Deep Root Fertilization: Trees and ornamental shrubs—deep root fertilize to promote lush, healthy-looking and vigorous crown growth. Urban soils tend to lacking in many of the nutrients that trees and shrubs need to survive. Many are malnourished or are starving to death, which is why they don’t look radiantly healthy are struggling with pest issues. Deep root fertilization helps to promote healthy-looking and pest-resistant trees and shrubs. The best time of the year to do this is in the spring and fall.
Red twigged Dogwood in bloom
  • Dogwood Anthracnose: Spraying with a fungicide at bud break and continue at 10 to 14 day intervals. 
  • Lawns: Fertilize lawns.
  • Leaf Blights: Spray trees and shrubs for fungal leaf diseases (e.g. powdery mildew, leaf blights, dogwood anthracnose, needle blights, etc.).
  • Monitor trees and shrubs for insect pests. Piercing and sucking plant pests (e.g. aphids, lacebugs, scales, weevils, mites, etc.) are now out and active. If major infestation occurs, plan a course of action to treat your trees and shrubs against these pests. Small numbers of piercing and sucking insects are not harmful to plants. In fact, they provide food for the beneficial, predatory insects that feed on them. To control harmful insects, one can apply systemic insecticides against piercing sucking insects (aphids, lacebugs, scales, weevils, etc.) via soil injections (one treatment gives season-long control). If applied according to label directions, this will kill only the harmful and not beneficial insects.
  • Photinia Leaf Spot: Spray with a fungicide as new shoots are developing at 30 day intervals.
  • Pine Dothistroma Needle Blight: Apply fungicide at just before bud break and a few weeks later according.
    Powdery Mildew: Apply a fungicides as soon as symptoms appear. Best efficacy occurs if used before symptoms appear. Use fungicide at 7 to 14 day intervals, or more often if conditions warrant it. If a plant is known to have had powdery mildew previously,  apply as buds start to open.
Photo of Japanese Maple leaves
  • Spider mites will start to become active as the weather warms. Systemic insecticides are available against this pest.
  • Tent Caterpillar: Apply systemic pesticide for season-long control.
  • Verticillium Wilt: Soil drench in the spring. Maples are especially susceptible to this fungal root disease as are cherries and plums.
  • Willow Twig Blight (scab): Apply two or three applications beginning when new leaves first appear at 10 to 14 day intervals.

Elsewhere in the Garden

Close up photo of a Hosta plant with variegated leaves.
  • Put slug bait around your flowers and tender perennials like primroses and hostas. 
  • Apply two to three inches of mulch (e.g. bark dust, garden compost or wood chips) on all of your shrub beds. Covering bare dirt areas in your yard with mulch helps to prevent soil compaction from rains, and weed growth, and helps to enrich our heavy clay soils.
  • Continue planting annual and perennial flowers.
  • Cut English ivy off of the base of trees. (This can be done any time of the year.)
Nuthatch bird in bird feeder
  • Feed the birds. Don’t stop feeding the birds even during the spring and summer seasons. Why? Even though we’re now past the winter season and there is more food available for the birds, having these feathery friends frequent your garden serves several purposes. First, they bring life and excitement to your backyard by turning it into a bird sanctuary. Second, your singing friends will thank you for your generosity by providing you with hours of entertainment, and by eating insect pests that harm your ornamental trees and shrubs.
  • Start making plans for your vegetable garden. Once the soil has dried out, you can begin working it for planting our veggies. Usually this will occur in late April or early May and sometimes later depending on the weather. The earlier you plant, the sooner you’ll be feeding on delicious veggies from your own garden! 
  • This is a good time of the year to plant trees and shrubs. Visit your local nursery and select your favorite ornamental shrubs and shade trees. After planting your new shrubs, just make sure that you water them well immediately and regularly subsequently for the first two or three summers until their roots get established. During warm weather (in the 60s to low 80s), deep root water once per week. During hot weather (mid-80s and higher) deep root water at least twice per week.
  • Water and fertilize annuals and perennial flowers. The hotter the weather, the more water they will need. Flowers in pots and hanging baskets dry out especially quickly, and so need watering every day or two.
  • Fertilize your ornamental shrubs with a slow release fertilizer. If the shrubs have a layer of barkdust or other mulch around them, rake the mulch away and apply the fertilize to the bare dirt, so that it actually reaches the plant’s root zone.
  • Plant new lawns. Fertilize your lawn. Aerate and dethatch.

Care of Roses

  • Dealing with rose pests: Spray or treat roses with a fungicide as needed preventively to insure protection against fungal pathogens such as black spot, powdery and cottony mildew, rust and spot anthracnose. Apply a fungicide only after the rose has put out several inches of new growth. Excellent choices of both organic and inorganic fungicides are available at your local garden center or nursery. Some fungicides require spraying in the early spring as the new growth is emerging. Major plant pests include mites, aphids, thrips, rose slugs, leaf rollers, rose midge, spittle bug and sawfly. Determine what pest or disease your rose has, do some research online if necessary to ascertain this, and then visit your local garden center or nursery to find the right product for the job. Always read and follow all label directions. It’s the law!

April in the Garden—A To Do List

This guide is tailored for the western valleys of Oregon and Washington

YOU can help to make the world a better, a more friendly, loving and beautiful place by being a good steward of the spot on this earth, your garden, that you have been given the privilege of borrowing for a time. It is our hope that the following to-do list will help you to do just that.

Nathan, the Treevangelist, urges you to treat your spot on this planet like your own personal Garden of Eden. May it become your personal paradise. This is your divinely mandated responsibility.  Your trees, shrubs, flowers and the wildlife in your yard will pay you back as they express their smiling appreciation to you and yours by radiating their love, joy and beauty bursting forth with vibrant and verdant life. Below is a to-do list to help fulfill this mission.

Let the show begin starting with the flora fireworks! This month, the garden is popping with life as the naked deciduous trees and shrubs don their seasonal leafy attire and celebrate the arrival of spring as they burst forth with all those pent up life-force juices as the stars of the plant world prance onto the garden stage to impress us with their performance. They’re beginning to flauntingly parade themselves down the garden’s catwalk with their fantasmic plethora and rainbowic panoply of colors from the lowly perennial primrose to the ostentatiously regal Mount Fuji cherry tree. Meanwhile, the birds are serenading us with their twitterpational love songs, and even the croaking frogs with their basso profundo tones are jumping into the garden’s three ring circus and trying to steal the show. So what more can be said? It’s time to get up and get out there and to join choir by donning your garden shoes and gloves and picking up your handy tools as nature’s orchestra play its halleluYah chorus!

While you’re at it, take a few moments and scroll back through this same Good News Tree Service, Inc. blog and check out the archives for any tree and plant care articles that you may have missed. Also check out our YouTube channel at https://www.youtube.com/channel/UCvcu2lL9NpgoXQtUFYyQShw, our Facebook page at https://www.facebook.com/GoodNewsTreeService/ and our main website at www.goodnewstree.com. Please enjoy!

Readers’ suggestions on how to improve this list are gladly solicited. If you, the reader, have any suggestions for additions to this month’s list, please put them in the comments section of this article, and I will add them to the list. Thank you in advance! — Nathan


Tree and Shrub Care

  • Fruit tree pruning. It’s time to finish pruning your fruit trees for fruit production. Also finish pruning your grapes, cane and trailing berries once the threat of major frost is past. Fruit trees can be pruned any time of the year, but it’s best not to prune them while they have flowers or fruit on them for fear of destroying part of your fruit harvest.
  • Finish planting your fruit trees. By getting them in the ground in the winter or early spring, they’ll have time to acclimate to their new home before summer comes. 
  • Mulch. Apply two to three inches of mulch around all trees and ornamental shrubs. This helps to fertilize the plants and feed the soil, and also protects them against weed growth and loss of water when the warmer  weather returns.
  • Pine tree pruning. Finish pruning coast/shore pines (Pinus contorta) and Scotch/Scots pines (Pinus sylvestris). These two pines are especially susceptible to the sequoia pitch moth whose larvae burrow into the tree trunks during the growing season (April through September) causing the trees to exude large amounts of unsightly pitch globules. While this seldom kills the tree, the bleeding of sap is not good for the overall health and vigor of the tree. It is advisable, therefore, not to prune these pine trees during the growing season, since the pruning cuts attract the moth, which then lays eggs on the tree, which hatch into tree-burrowing larvae. Pruning should be done on your pines from November to March.
  • Plant or transplant trees and shrubs. Early spring is still a good time to plant or transplant ornamental trees and shrubs. Cooler weather means less transplant shock to the plants, and over  the winter and spring, they will have time to begin to acclimate to their new environment before the stress of the next summer season occurs.
  • Pruning of large trees. Most trees in the temperate western valleys of Oregon and Washington can be pruned anytime of the year. If you’re not sure what to do, or how to do it, call Good News Tree Service, Inc. for a consultation, pruning lessons or to have them do the pruning for you.
  • Pruning of ornamental shrubs. Early in the spring before a lot of new growth starts is a good time to do major pruning (called heading back) of rhododendrons (or rhodies) and other similar ornamental shrubs back to latent buds in trunks and stalks. Do this before spring growth begins in the near future.
  • Prune fast growing ornamental shrubs that are beginning to look shabby. You may need to prune them again in the early summer for a more neat and manicured look. 
  • Reparative pruning. Repair winter damaged to trees and shrubs.
  • Tree and shrub removal and stump grinding can be done all year long. 
  • Trees. Have an ISA Certified Arborist with an ISA Tree Risk Assessment Qualification (like Good News Tree Service, Inc.) inspect your large trees for the potential of failure due to weak root systems and defects in trunks and branches. This is best done when the leaves are off the trees.

Plant Health Care

Good News Tree Service, Inc. provides full plant health care services as listed below.

  • Apple scab on ornamental crabapple and fruiting apple trees. The first visible symptoms occur on leaves in spring as pale, yellowish, water-soaked spots the size of a pinhead. These enlarge, becoming darker and smoky in appearance, later taking on an olive shade and ultimately a brownish black color. Spots may be any shape but are frequently circular. Young infections often show a radiating spread of fungal tissue through the leaf, and such areas later appear as irregular, brown-colored infections. Diseased leaves can be curled and distorted and often drop early. This fungal disease can also move into the fruit to produce a scabby effect, hence the name “apple scab.” Several fungicidal sprays are required to control this disease just prior to flowering and after flowering. 
  • Arborvitae Twig Blight (Thuja occidentalis): Spray in the spring and early summer when new growth starts at two week intervals. 
  • Birch Rust Fungus: Occurs on leaves. Spray before symptoms appear on 10 to 14 day intervals—4 apps if infestation is severe.
  • Cherry Tree Brown Rot Blossom Blight (Monilinia fructicola):Make 3 foliar applications starting at bud break and at 14 day intervals.
  • Coryneum Blight (Shot Hole Fungus) or Cherry & Plum Leaf Spot: This leaf blight affects ornamental and flowering cherry, plum and prune trees. Apply fungicide in the spring at flower petals fall, shuck fall and two weeks later.
  • Crabapple Leaf Blight. Apply fungicide as the leaf clusters are just opening up and make several more applications subsequently as per label directions.
  • Deep Root Fertilization: Trees and ornamental shrubs—deep root fertilize to promote lush, healthy-looking and vigorous crown growth. Urban soils tend to lacking in many of the nutrients that trees and shrubs need to survive. Many are malnourished or are starving to death, which is why they don’t look radiantly healthy are struggling with pest issues. Deep root fertilization helps to promote healthy-looking and pest-resistant trees and shrubs. The best time of the year to do this is in the spring and fall.
  • Dogwood Anthracnose: Begin spraying with a fungicide at bud break and continue at 10 to 14 day intervals. 
  • Dormant Spraying of Fruit Trees: Continue fungal sprays until after flower petals have dropped off.
  • Magnolia Bacterial Blight: Apply one fungal spray in fall and twice in spring near budbreak.
  • Lawns: Fertilize lawns.
  • Leaf Blights: Spray trees and shrubs for fungal leaf diseases (e.g. powdery mildew, leaf blights, dogwood anthracnose, needle blights, etc.).
  • Monitor trees and shrubs for insect pests. When piercing and sucking plant pests (e.g. aphids, lacebugs, scales, weevils, mites, etc.) hatch varies each year depending on when the warmer weather begins. Usually, hatching of plant pests begins from early to late April. When consistent warm weather begins to occur, start monitoring plants for insect nymphs and adults. If necessary, plan a course of action to treat your trees and shrubs against these pests.
  • Pear Rust: Apply fungicide in early spring about bloom time as the orange fungal telium (pl. telia) begin to appear.
  • Photinia Leaf Spot: Spray with a fungicide as new shoots are developing at 30 day intervals.
  • Piercing/Sucking Insects: Continue applying systemic insecticides against piercing sucking insects (aphids, lacebugs, scales, weevils, etc.) via soil injections (one treatment gives season-long control). 
  • Pine Dothistroma Needle Blight: Apply fungicide at just before bud break and a few weeks later.
  • Powdery Mildew: Apply a fungicides as soon as symptoms appear. Best efficacy occurs if used before symptoms appear. Use fungicide at 7 to 14 day intervals, or more often if conditions warrant it. If a plant is known to have had powdery mildew previously,  apply as buds start to open.
  • Spider mites will start to become active as the weather warms. Systemic insecticides are available against this pest.
  • Tent Caterpillar: Apply systemic pesticide for season-long control.
  • Verticillium Wilt: Soil drench in the spring. Maples are especially susceptible to this fungal root disease as are cherries and plums.
  • Willow Twig Blight (scab): Apply two or three applications beginning when new leaves first appear at 10 to 14 day intervals.

Elsewhere in the Garden

  • Put slug bait around your flowers and tender plants such as hostas, primroses and other slug loving plants. 
  • Apply two to three inches of mulch (e.g. bark dust, garden compost or wood chips) on all of your shrub beds. Covering bare dirt areas in your yard with mulch helps to prevent soil compaction from rains, and weed growth, and helps to enrich our heavy clay soils.
  • Begin planting annual and perennial flowers.
  • Cut English ivy off of the base of trees. (This can be done any time of the year.)
  • Cut off last year’s fronds from ferns as new fiddleheads begin to emerge.
  • Feed the birds. Dutifully maintain your bird feeders. Bring life and excitement to your backyard by turning it into a bird sanctuary. The birds will thank you for your generosity by providing you with hours of entertainment, and by eating insect pests that harm your ornamental trees and shrubs. Birds in the yard are not only fun to watch, but they perform the vital task of eating harmful insects. 
  • Start making plans for your vegetable garden. Once the soil has dried out, you can begin working it for planting our veggies. Usually this will occur in late April or early May and sometimes later depending on the weather. The earlier you plant, the sooner you’ll be feeding on delicious veggies from your own garden!
  • Plant new lawns. Fertilize your lawn. Aerate and dethatch.
  • Continue to keep your bird feeders full. Why? Even though we’re now past the winter season and there is more food available for the birds, having these feathery friends frequent your garden serves several purposes. First, they bring life and excitement to your backyard by turning it into a bird sanctuary. Second, your singing friends will thank you for your generosity by providing you with hours of entertainment, and by eating insect pests that harm your ornamental trees and shrubs. 

Rose Care

  • April: Roses are flowering machines and need regular fertilizing. They require three fertilizations per year. First in April, then at the end of June, and finally in late August. Fertilize roses with something like a 15-10-10, 20-20-20 or 30-15-15 fertilizer. Use a variety of types of fertilizers for best results.
  • Dealing with rose pests: Spray or treat roses with a fungicide as needed preventively to insure protection against fungal pathogens such as black spot, powdery and cottony mildew, rust and spot anthracnose. Apply a fungicide only after the rose has put out several inches of new growth. Excellent choices of both organic and inorganic fungicides are available at your local garden center or nursery. Some fungicides require spraying in the early spring as the new growth is emerging. Major plant pests include mites, aphids, thrips, rose slugs, leaf rollers, rose midge, spittle bug and sawfly. Determine what pest or disease your rose has, do some research online if necessary to ascertain this, and then visit your local garden center or nursery to find the right product for the job. Always read and follow all label directions. It’s the law! 

Happy gardening!


March in the Garden—A To Do List

This guide is tailored for the western valleys of Oregon and Washington. 

YOU can help to make the world a better, a more friendly, loving and beautiful place by being a good steward of the spot on this earth, your garden, that you have been given the privilege of borrowing for a time. It is our hope that the following to-do list will help you to do just that.

Nathan, the Treevangelist, urges you to treat your spot on this planet like your own personal Garden of Eden. May it become your personal paradise. This is your divinely mandated responsibility.  Your trees, shrubs, flowers and the wildlife in your yard will pay you back as they express their smiling appreciation to you and yours by radiating their love, joy and beauty bursting forth with vibrant and verdant life. Below is a to-do list to help fulfill this mission.


We thought that we would skate through winter again this year with very little cold or harsh weather, and then the epic storm with its wintery mix hit the NW Oregon area on the early morning of February 13. This was the storm of a century, at least!

In the northern sections of the Portland metro area snow and ice covered the region. In the southern area where Good News Tree Service, Inc. operates, we had ice—and lots of it in the form of freezing rain and sleet. (To see a photo gallery of both the devastation and sublime, though short-lived beauty of it, go to https://goodnewstree.com/2021/02/27/pristine-beauty-in-the-midst-of-cataclysmic-destruction-the-ice-storm-of-a-century/.) Depending on your elevation, there was anywhere from three-quarters of an inch to more than an inch of ice on every leaf, needle, twig, limb, trunk, flower and blade of grass!

This storm was likely the greatest of its kind in 100 to 150 years. How do I know this? The countless numbers of native Oregon white oak trees ages 150 to 250 years old that were snapped in half like toothpicks, or had major tree trunk-sized limbs broken, indicates that these trees had experienced nothing like this in a very long time, if ever. This dystopian and cataclysmic event extended into the central Willamette Valley and effected hundreds of thousands of people. We are still cleaning up the mess from this, and will be doing so for a very long time.

In the mean time, moderate, gorgeous spring-like weather has returned to our region, and the seeming frail flowers that were only recently encased in and laden with an inch or more of ice are now blooming happily as if unaffected by the adverse conditions. Ironically, the stalwart and mighty trees like the oaks were pummeled to pieces, while the fragile flowers escaped with hardly a bruise. Such are the ever-changing vicissitudes and the contradicting ironies of nature.

While you’re at it, take a few moments and scroll back through this same Good News Tree Service, Inc. blog and check out the archives for any tree and plant care articles that you may have missed. Also check out our YouTube channel at https://www.youtube.com/channel/UCvcu2lL9NpgoXQtUFYyQShw, our Facebook page at https://www.facebook.com/GoodNewsTreeService/ and our main website at www.goodnewstree.com. Please enjoy!

Readers’ suggestions on how to improve this list are gladly solicited. If you, the reader, have any suggestions for additions to this month’s list, please put them in the comments section of this article, and I will add them to the list. Thank you in advance! — Nathan

Tree and Shrub Care

  • Fruit tree pruning. Prune your fruit trees for fruit production. You can also prune grapes, cane and trailing berries once the threat of major frost is past.
  • Plant fruit trees.
  • Mulch. Apply two to three inches of mulch around all trees and ornamental shrubs. This helps to fertilize the plants and feed the soil, and also protects them against weed growth and loss of water when the warmer  weather returns.
  • Pine tree pruning. Prune coast/shore pines (Pinus contorta) and Scotch/Scots pines (Pinus sylvestris). These two pines are especially susceptible to the sequoia pitch moth whose larvae burrow into the tree trunks during the growing season (April through September) causing the trees to exude large amounts of unsightly pitch globules. While this seldom kills the tree, the bleeding of sap is not good for the overall health and vigor of the tree. It is advisable, therefore, not to prune these pine trees during the growing season, since the pruning cuts attract the moth, which then lays eggs on the tree, which hatch into tree-burrowing larvae. Pruning should be done on your pines from November to March.
  • Plant or transplant trees and shrubs. Winter is a good time to plant or transplant ornamental trees and shrubs. Cooler weather means less transplant shock to the plants, and over  the winter and spring, they will have time to begin to acclimate to their new environment before the stress of the next summer season occurs.
  • Pruning of ornamental shrubs. Do major pruning (called heading back) of rhododendrons (or rhodies) and other similar ornamental shrubs back to latent buds in trunks and stalks. Do this before spring growth begins in a couple of months.
  • Pruning of large trees. Winter is a great time to do aesthetic and structural pruning of deciduous trees and shrubs, since the structure or architecture of the plant is clearly visible making aesthetic pruning easier than when plants are foliated. Structural defects, which can cause tree failure, are more easily spotted as well. Also remove of dead wood, and pruning to reduce hazards. If you’re not sure what to do, or how to do it, call Good News Tree Service, Inc. for a consultation, pruning lessons or to have them do the pruning for you.
  • Reparative pruning. Repair winter damaged to trees and shrubs.
  • Roses. The best time to prune roses is after the threat of major frost is past.
  • Tree and shrub removal and stump grinding can be done all year long. 
  • Trees. Have an ISA Certified Arborist with an ISA Tree Risk Assessment Qualification (like Good News Tree Service, Inc.) inspect your large trees for the potential of failure due to weak root systems and defects in trunks and branches. This is best done when the leaves are off the trees.

Plant Health Care

Good News Tree Service, Inc. provides full plant health care services as listed below.

  • Apple scab on ornamental crabapple and fruiting apple trees. The first visible symptoms occur on leaves in spring as pale, yellowish, water-soaked spots the size of a pinhead. These enlarge, becoming darker and smoky in appearance, later taking on an olive shade and ultimately a brownish black color. Spots may be any shape but are frequently circular. Young infections often show a radiating spread of fungal tissue through the leaf, and such areas later appear as irregular, brown-colored infections. Diseased leaves can be curled and distorted and often drop early. This fungal disease can also move into the fruit to produce a scabby effect, hence the name “apple scab.” Several fungicidal sprays are required to control this disease just prior to flowering and after flowering.
  • Arborvitae Berckmann’s Blight (Platycladus orientalis): Spray in the fall (late Sept. and early Oct., and again in early Nov. Spray again in early spring (Feb to Mar) if disease is severe. 
  • Cherry Tree Brown Rot Blossom Blight (Monilinia fructicola):Make 3 foliar applications starting at bud break and at 14 day intervals. 
  • Coryneum Blight (Shot Hole Fungus) or Cherry & Plum Leaf Spot: This leaf blight affects ornamental and flowering cherry, plum and prune trees. Apply fungicide in the spring at flower petals fall, shuck fall and two weeks later.
  • Crabapple Leaf Blight. Apply fungicide as the leaf clusters are just opening up and make several more applications subsequently as per label directions.
  • Deep Root Fertilization: Deep root fertilize your trees and shrubs just prior to or as new leaves begin to emerge. Apply when soils are not super-saturated with rain, so that the fertilizer isn’t washed away from plants’ roots after applications is made.
  • Dormant Spraying of Fruit Trees: Apply dormant sprays against insects and fungi.
  • Lawns: Fertilize yellowing lawns.
  • Leaf Blights: Spray trees and shrubs for fungal leaf diseases (e.g. powdery mildew, leaf blights, dogwood anthracnose, needle blights, etc.).
  • Magnolia Bacterial Blight: Apply one spray in fall and twice in spring near budbreak. 
  • Monitor trees and shrubs for insect pests. When piercing and sucking plant pests (e.g. aphids, lacebugs, scales, weevils, mites, etc.) hatch varies each year depending on when the warmer weather begins. Usually, hatching of plant pests begins from early to late April. When consistent warm weather begins to occur, start monitoring plants for insect nymphs and adults. If necessary, plan a course of action to treat your trees and shrubs against these pests.
  • Piercing/Sucking Insects: Begin applying systemic insecticides against piercing sucking insects (aphids, lacebugs, scales, weevils, etc.) via soil injections (one treatment gives season-long control). 
  • Photinia leaf spot. Spray a fungicide early in February of four applications at two week intervals afterwards. Early spray is key to controlling this fungus.
  • Powdery Mildew: Apply a fungicides as soon as symptoms appear. Best efficacy if used before symptoms appear. Use fungicide at seven to fourteen day intervals, or more often if conditions warrant it. If a plant is known to have had powdery mildew previously,  apply as buds start to open.
  • Tent Caterpillar: Apply systemic pesticide for season-long control.
  • Verticillium Wilt Fungal Disease: Apply a soil in the fall and spring.

Elsewhere in the Garden

  • Put slug bait around winter flowers. Though the weather may be cold, slugs are still active.
  • Rake and dispose of ornamental tree leaves, or better yet, compost them and then spread the decomposed leaves back onto your shrub beds as a mulch next year.
  • Mulch all of your shrub beds. Put a two to three inches of mulch (e.g. bark dust, garden compost or wood chips) around perennials and other plants that might be sensitive to subfreezing weather.  Also, spread a fresh layer of mulch (e.g. bark dust, garden compost or wood chips) on all the bare dirt areas in your yard to prevent soil compaction from rains, to prevent weed growth and to enrich and help to condition your heavy clay soils.
  • Cut English ivy off of the base of trees. (This can be done any time of the year.)
  • Feed the birds. Dutifully maintain your bird feeders. As winter comes, birds have a harder time finding food.  Bring life and excitement to your backyard by turning it into a bird sanctuary. The birds will thank you for your generosity by providing you with hours of entertainment, and by eating insect pests that harm your ornamental trees and shrubs. Remember to feed the humming birds, who have few flowers to feed on during the winter. Birds in the yard are not only fun to watch, but they perform the vital task of eating harmful insects. 

Rose Care

  • Mid to late-February  or early March (or after the threat of hard frosts have passed: Prune roses for health and bloom potential. Remove dead, weak and spindly canes. Leave only the strongest and healthiest canes that are equally spread apart thus giving them good air circulation to reduce the potential spread of fungal pathogens that cause leaf diseases. An open spacing pattern of the canes also provides ample room for the blooms to grow without crowding each other. Make pruning cuts slightly above an outward-facing bud. Endeavor to prune rose bushes into an upward and outward vase-shaped form.
  • Late winter-early spring: Now is the time to plant roses. Plant them in full sun. Roses don’t do well in shade and need at least six hours of sun per day especially in the summer. Morning sun is preferable to dry off the dew. Add plenty of mulch, manure or other soil amendment into the soil when planting. Choose pest and disease resistant rose varieties for best, long term results.