This disease may occur any time from late fall until early spring when temperatures range from 28-45 degrees. An excessive amount of moisture or melting snow must be present for the weed to develop. Snow Mold is more likely to occur on grass that was too tall as it entered the winter. Damage is more severe when snow covers the turf for long periods. Grass in these areas becomes matted, closely pressed to the ground, and often can be completely destroyed.
What to do: The matted areas of grass should be loosened to improve air circulation. A good raking with a leaf rake will fluff the grass and improve air circulation. If you find the grass so long that it will not stand up, you can mow it to remove extra long blades of grass. With proper fertilization and follow-up maintenance, the lawn may recover without needing any reseeding.
Be sure your lawn is not too tall going into winter. Keep mowing it as long as it needs it. A good time to stop is after the area has a hard freeze. Rake or mulch leaves to prevent smothering of the grass. Also, when shoveling snow during the winter, avoid piling snow into localized areas.
We’re happy to help with this disease; give us a call and we can give you customized advice about how to handle this on your lawn.