Cantankerous Cankers
by Christopher Starbuck

The term “canker” refers to a lesion on a twig, branch or stem, usually caused by a bacterial or fungal pathogen. The appearance of cankers varies, depending on the host and the pathogen. Often, the bark of the affected stem or trunk is sunken and discolored. Fluids may ooze from a canker or fungal fruiting structures may appear on the bark covering or surrounding the lesion. In some cases, lesions remain small and isolated, causing no major problems for the host plant. In other cases, the canker spreads widely, causing death of twigs, branches or even the main trunks of trees. The best known example of the destructive potential of a canker disease is chestnut blight, caused by the fungus Endothia parasitica, which caused the virtual extinction of the American chestnut within 40 years of its accidental introduction to the United States in about 1900.   >> read article
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Those “Other” Magnolias
by Scott Beuerlein

There are three reasons people don’t plant magnolias anymore: 1) Everybody assumes “magnolia” means only the saucer magnolias (Magnolia x soulangeana) they remember from their youth, which, 2) ate all of Grandma’s front yard, and 3) had its flowers blasted every third year by a frost. Now, listen to me carefully: These reasons are dumb.   >> read article
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Plants Need Their Rest Too
by Garry V. McDonald

This is about the time of year I start getting inquiries from local media about why leaves turn colors in the fall. What they really want to know is the exact week of peak color to inform the leaf-peepers. I usually respond that the plants are preparing to enter dormancy and peak color depends on prevailing weather conditions and is often unpredictable.

But what exactly is dormancy and why is it crucial to plants? Like explaining why leaves change color, the answer is not straightforward and “depends,” which is not the answer most people want to hear. I’ll attempt to explain in layman’s terms an interesting facet of a plant’s life.
  >> read article
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Sweet Native Fruit Trees That Won’t Leave You Bitter
by Scott Beuerlein

With surprising regularity, some poor schlep of a volunteer from a community garden – abuzz with visions of plump, perfect sweet cherries, heirloom apples, and sugar plums dancing in his or her head – will email me with a simple question that they expect will have a simple answer. The question is always some variation on this: “What apples, pears, and peaches would you recommend for a community orchard?” I wish I could see the looks on their faces when they get a big old heaping serving of attitude.   >> read article
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What Are Champion Trees?
by William “Jack” Rowe

You may hear people speak of them reverently. You might catch word of a “big tree,” an important tree, a “Champion Tree.” But trees don’t compete for titles; they grow their own crowns and are made into trophies instead of receiving them. Trees do compete though. Rooting space, water, light, pollinators, producing many seeds, and so on are the prizes trees, by their nature, seek. It’s the winners of these competitions that we humans notice and some of these winners are named Champion Trees.   >> read article
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Native Trees for the Landscape
Add native trees to your landscape to help biodiversity
by Scott A. Zanon

So what is a “native” tree? It can be any tree from a state or region. The deciduous trees considered for this article are native to North America, and once established, should grow and survive in their planted areas. Most are tough trees rarely affected by urban life and environmental issues.

Some gardeners seem highly interested and motivated to plant native trees. Native trees appear to adapt better to landscape environments compared to alternative species, and they help protect and restore biodiversity. Natives are effective for use in urban, suburban and rural developed landscapes.

Below are 15 trees to consider for your landscape or property with important notes and descriptions about each. I hope you carefully study these and consider planting a few in your property. They are durable yet functional native tree choices.   >> read article
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Abiotic Disorders in the Landscape
by Wayne Porter

Plants are often subjected to stresses in the environment that are not results of insects or diseases. These stresses are referred to as “abiotic” diseases. These abiotic disorders result in the plant being less vigorous and in many cases dying. The majority of these stress situations are the result of human activities.   >> read article
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What? Me Worry?
Symptoms that aren't as serious as they look
by Jonathan Heaton

As an arborist, I work with a lot of people who care deeply about their trees and shrubs. Almost once a week, I will get a call from someone who is alarmed that something new they’ve noticed on their tree might be a major problem. Sometimes it is a problem that needs help, but often it is something that looks bad, but isn’t. Here are some of the common issues that arise.   >> read article
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