There are 2 types of snow mold, gray and pink. They are cause by different pathogens but often occur under the same environmental conditions.

Gray Snow Mold is first noticeable in early spring after the snow melts. It often show up in areas where snow has accumulated for long periods of time. Many times along driveways and where snow drifts are common. Grass that has been affected by gray snow mold has matted, bleached and has a gray look to it. In most cased the grass has been killed, but the roots are still alive.

Pink Snow Mold does not need the accumulation of snow. It can show up in the moist weather of both the spring and fall. Fungus will develop and turn the grass blades pink. The affected grass becomes brown or tan as warm dry weather returns. Like gray snow mold, pink snow mold usually kills leaf blades only. However, if left untreated pink snow mold can damage the roots as well.

Snow Mold problems can be minimized by mowing you lawn at the recommended heights well into the fall to avoid the accumulation of moisture on long grass, which breed disease. Eliminating snow piles will help reduce the threat as well. Also, improving drainage to eliminate accumulated moisture and lightly raking affected areas in the spring will help break up and dry out the matted grass. Core Aeration and Over Seeding may be necessary if the infected areas do not recover.