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diagram of branch bark ridge and branch bark collar

Tree pruning tips for 2021

Like a scene from an old western: with a pair of sterilized pruners, and her boots, horticulturists Kelly Allsup walks up to the newly planted English White oak hybrid. Her sole intent of increasing the life of an urban tree. She walks around...
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loppers cutting a tree branch

Proper Pruning of Trees

Trees in the landscape can be easily overlooked for the all the benefits they provide us whether that be casting shade on a warm, summer day, housing our feathered, birds friends, or adding a touch of color to our lawns. According to the Council of Tree and Landscape Appraisers, trees on a property...
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Gymnosperms, like this Colorado blue spruce, are a group of nonflowering plants that emerged several hundred million years before flowering plants (angiosperms) entered the evolutionary history of the plant kingdom.

Angiosperms vs Gymnosperms

The plant kingdom has not always had the diversity we know today.  It has taken hundreds of millions of years of evolution to bring about the diverse, complex group of flowering plants known as angiosperms.  And for many millions of years prior to the emergence of angiosperms, the plant...
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The frosty accumulation of ice crystals on these spruce needles resulted from the wafting spray of an adjacent (untreated) roadway and serves to illustrate how salt spray can accumulate on plant parts.

How winter salt can damage landscape plants

Deicing salts are essential to winter travel in Illinois and provide necessary safety in a landscape setting by melting dangerous ice on precarious steps, sidewalks, entryways, and other areas of frequent foot traffic. However, winter damage from salt can be a major problem in some landscapes...
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Ice accumulation yesterday resulted in damage to many trees and shrubs in our area.

Ice Accumulation on Trees and Shrubs

Freezing rain is a regular part of winter weather patterns in central Illinois, resulting in occasional ice storms that can damage property, take out utilities and wreak havoc on tree canopies.  By meteorological definition, an ice storm occurs when ice accumulation is greater than 0.25 inches...
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Many ways to recycle the Christmas tree

I know you are already thinking, “Why is he talking about what to do with the holiday tree while presents are still under it?” Well, I may be rushing the calendar a bit, yet having an expectation of how best to recycle the tree makes the follow-through easier. Right now, taking care of the tree...
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Trees and other woody plants grow from buds at tip of each limb which release hormones to suppress growth of other buds lower down the stem.

How Woody Plants Grow

Woody plants are some of the largest and most long-lived plants in the landscape, forming the majestic and expansive canopy of our urban and natural forests.  With all of this wonderful woody growth, have you ever stopped to think about why woody plants attain greater height than their smaller...
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College of Agricultural, Consumer & Environmental Sciences Illinois Extension

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Urbana, IL 61801

Email: extension@illinois.edu

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