Plants & Gardening
Winter weather in Chicago often has surprises.
Snow covered the grass of the Elizabeth Hubert Malott Japanese Garden in 2013. This protected grass can expect good growth in spring.
You may be bitterly cursing the snow and hoping winter will end, cheering a thaw and higher temperatures. What you might not know is that all this snow has a number of benefits that will help your garden and landscape later this spring.
The fruit of eastern wahoo (Euonymous atropurpureus) creates a striking contrast against the snow.
Snow is a great insulator!
As winter presses on, the ground freezes deeper and deeper. This prolonged cold soil can damage roots over time. Snow helps create a blanket that reduces freezing of the soil. Warmer soil keeps microbes more active, which helps break down any plant waste that is in the soil, releasing nutrients. As a result of this insulation, your plants will have a much better start in spring!
Snow brings an important nutrient into the soil: nitrogen
There are not many ways for nitrogen to enter the soil. While planting legumes and adding fertilizer are the most common ways we add nitrogen to soil, the weather provides nitrogen as well! Nitrogen is abundant in the atmosphere and is most easily collected by falling snow. As the snow melts, it deposits the nitrogen into the ground. (Apple trees and other plants benefit greatly from nitrogen deposited by snow.) When the ground is soft, plowing the snow into the soil will give the greatest benefit. Snow is sometimes called the poor man’s fertilizer.
The yellow whips of this willow make an excellent contrast to the snow in most landscapes.
Don’t forget, snow is water!
When snow melts, it provides moisture for evergreen trees and shrubs. This moisture helps keep these plants happy and healthy throughout the winter. You won’t see damage right away, but a few years of snow-free winters can cause health problems in your trees.
Last but not least, snow can be very attractive in a landscape.
Snow makes plants with ornamental fruit, flowers, and bark stand out in the winter landscape. Plants like holly, ornamental grasses, euonymus, crabapples, roses, birches, ghost bramble, striped maple, dogwoods, willows, hazels, winter hazels, and witch hazels are only a few of many very attractive plants for a winter landscape. Dogwoods and willow varieties often will have young growth that is orange, yellow, or red. These same colors appear in the fruit of euonymus, crabapples, roses, and holly. Look for varieties that will complement your landscape.
If you find that snow is weighing down branches in your landscape and disfiguring the appearance of your shrubs or young trees, brush off the snow regularly and prune in the spring to remove any dead or broken branches.
Evergreen trees and shrubs like boxwoods and hemlock need water through the winter to stay healthy.
Boxwoods are prone to damage from heavy snows. Minimize damage by removing snow as soon as possible from the branches.
When the snow melts, check your trees and shrubs for damage near the trunk of the plant. Rodents, particularly voles, take advantage of winter snow cover and feed more aggressively on tender bark of young trees. If your lawn has developed paths of dead grass from these garden pests, rake affected areas of the lawn, apply a light application of fertilizer and seed the affected areas if damage is severe.
While many of us are hoping for an end to winter, an abundance of snow promises a great spring!