Gray snowmold is a fungal disease that appears after the winter snow cover melts. It causes circular patches of gray or straw-colored grass, ranging from a few inches to several feet in diameter. The infected grass is matted down and a white or gray fungal growth may be visible on the leaves. Gray snowmold usually occurs when temperatures are around freezing and the snow cover is deep and persistent.
Recovering from gray snowmold involves several steps.
First, air and sunlight help the grass dry out and prevent the further spread
of the disease. Next, fertilizer to encourage new growth. Proper practices,
such as regular mowing, sand topdressing and aeration can repair and help
prevent future outbreaks of gray snowmold in low lying areas.
We treat our putting greens to prevent snowmold every year
because it can affect ball roll in the spring. It is rare to see snowmold in
Denver due to our usually mild winters. You will see it disappear after frequent
mowing.
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