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Hawthorn Mealybug

Hawthorn Mealybug

A major pest almost unique to the Front Range of Colorado: the hawthorn mealybug. We don’t really know why it likes it here so much, but it is far less common in other parts of the country. This insect can do serious damage to the tree, including mortality. It also drips honeydew which attracts yellowjackets […]

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Posted in: Insects

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Reducing Cottonwood Cotton

Reducing Cottonwood Cotton

If you have a cottonwood tree that makes a big mess of cotton in your yard every year, there’s good news. With a well-timed spray in the spring, we can reduce or even eliminate the cotton production for that year. Some people’s yards (and dogs, cars etc.) get burried in cotton every summer and it […]

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Posted in: General Care

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Tree selection

Northern Colorado Tree Selection Guide Here it is, the unofficial tree selection guide for trees in Northern Colorado. This is just a quick overview to get you started. I’ve only listed trees readily available at nurseries in Fort Collins, Loveland and Windsor and that are proven to do well locally. I always say: There’s what […]

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Posted in: Tree Selection & Planting

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Some thoughts on tree pruning

To prune, or not to prune? I have an unpopular opinion for an arborist to share: I don’t like the practice of pruning trees. I think it’s generally unnecessary, and often counter-productive. Some people (especially other arborists?) will take issue with this, so let me explain myself. Let’s look at some reasons why a tree […]

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Posted in: General Care

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Keeping your aspen trees healthy

Keeping your aspen trees healthy

Although aspen are a popular choice along the front range, they would probably prefer to stay up in the mountains where they come from. The combination of our heavy alkaline soil and hot summers really put them under stress, predisposing them to a multitude of diseases. Fortunately these problems aren’t too difficult to treat with […]

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Posted in: General Care

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Keeping Evergreens Green with Anti-Dessicant Sprays

Keeping Evergreens Green with Anti-Dessicant Sprays

Some evergreens trees and bushes get winter burn, even when consistently watered. In particular arborvitae, alberta spruce and yew (buxus) have problems getting through the winter with all their needles intact even with adequate water. These plants do best in places with damp, overcast winters; the opposite of winter conditions in Colorado. Yew, for example […]

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Posted in: General Care

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Tree Diseases

Tree Diseases

Common tree diseases of the Fort Collins area This page addresses some of the most common and important biotic diseases that affect trees of the northern Front Range. Biotic diseases imply there is a living agent causing the problem such as a fungus, virus or bacteria, as opposed to abiotic diseases which are environmental or […]

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Posted in: Diseases

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How and When to Prune Lilacs

How and When to Prune Lilacs

The How and When of pruning lilacs in Northern Colorado It seems lilacs, more than any other shrub, tend to overgrow their space. Without regular pruning they get lanky, droopy, produce less flowers and generally start looking like a mess. Lilacs can grow pretty fast and before you know it you can have a small […]

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Posted in: Uncategorized

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