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Horticulture and Home Pest News
Horticulture & Home Pest News is filled with articles on current horticulture, plant care, pest management, and common household pests written by Iowa State University Extension specialists in the Departments of Entomology, Horticulture and Plant Pathology.

Snow and Ice can Damage Trees and Shrubs

This article was published originally on 12/9/1994
While we have had a mild fall, cold wintry weather undoubtedly lies ahead. Heavy amounts of snow and ice on the branches of trees and shrubs can cause considerable damage. Multi-stemmed evergreens, such as junipers and arborvitae, and weak-wooded deciduous trees, such as Siberian elm, green ash, and silver maple, are most susceptible to branch breakage. Improper removal of ice and snow can increase the amount of damage to trees and shrubs.

During the winter months, the most serious damage to trees and shrubs generally occurs during ice storms. Large branches or entire trees can be lost due to the tremendous weight of the ice. When the weight of ice causes a small tree to bend sharply, it may be possible to prop it up to prevent breakage. Don't attempt to remove the ice by beating the branches with a broom or rake. This will only cause greater damage. If the temperature is above freezing, spraying the ice-coated branches with cold water will help melt the ice. Hot or boiling water, however, may actually injure the trees and shrubs. Individuals should stay away from large, ice-laden trees. Nothing can be done to prevent damage to large trees. Individuals, however, can be severely injured or killed if a large tree or branch where to suddenly crash to the ground while underneath it.

Accumulations of heavy, wet snow on evergreens can also cause severe branch breakage. When heavy, wet snow accumulates on evergreens, gently shake the snow from the branches or carefully brush off the snow with a broom. When shoveling driveways and sidewalks, don't throw heavy, wet snow or ice onto shrubs or small trees. The weight of the heavy, wet snow and ice can cause considerable damage.

If branch breakage occurs on a tree, prune back the damaged limb to the main branch or trunk. Damaged shrubs may need to be pruned in the spring to restore their attractive, natural shape.

A snow and ice covered landscape is a beautiful winter scene. Unfortunately, the weight of the ice and snow can cause considerable damage to woody ornamentals.



This article originally appeared in the December 9, 1994 issue, p. 161.

Year of Publication: 
1994
Issue: 
IC-467(26) -- December 9, 1994