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A mature American elm at Morton Arboretum in Lisle, IL

Breeding elms to combat Dutch elm disease

Over this past week, the fall weather has brought bare branches to the previously color-filled canopies of so many trees in the landscape.  As the autumn leaf drop has progressed, there are several elm trees that I pass each day which have held onto their fall color and really look spectacular...
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brilliant red fall color of Eastern Wahoo shrub

Nature's Technicolor Dreamcoat: The science of fall color

You feel it, don't you? Sunrise coming later, sunset earlier, and the roller rink of acorns underfoot. The change of seasons is well underway. And just as you are pulling out your flannel shirts, wool socks, and warm gloves the trees and shrubs are also pulling out their fall wardrobe. The...
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Smooth sumac is a commonly occurring native plant that boasts a spectacular fall display of fiery red leaves.

Native Shrubs for Fall

Shrubs are often overlooked in autumn, typically playing second fiddle to overtopping shade trees that steal the fall display.  However, quite a few deciduous shrubs have spectacular fall color to offer in the landscape.  In many settings these smaller woody plants can help provide eye-...
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Gardening chores don't know summer is over

Some of our late summer and early fall garden tasks can take more time than others. Making a “to do” list can help us get them done in a timely manner and not forget anything. (For example, hurrying to get the houseplants in just after dark and before that predicted frost is never fun.) Here’s a...
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Tree Root Collar Disorders

The root collar of a tree can be defined as an area of the lower trunk that transitions from trunk tissue to root tissue.  It is typically associated with the basal flare, or the trunk flare of the tree, which is the wider portion of trunk that insects the ground.  In recent years,...
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