Spring is on its way and the snow is melting! As exciting as the melting snow is, it may uncover a problem with your lawn. If you are seeing grey or pink patches on your grass, you may have snow mold. Snow mold is a fungal disease that becomes active under the snow during the winter.
There are a few things you can do to prevent snow mold. It is recommended to continue mowing your lawn until it is no longer actively growing in the fall. Longer grass has a higher chance of causing snow mold. In the fall, don't apply too much nitrogen to your lawn before the winter. Excess nitrogen can cause snow mold. When the leaves start falling, do rake them up. Having a layer of leaves under the snow also creates an environment for snow mold to grow. Finally, keep large piles of snow to a minimum so that the snow will melt faster.
Snow mold is typically not too serious. The problem will sometimes go away on its own. Some common solutions to treat snow mold is to gently rake the area to help the affected area dry out., reseeding, or if the snow mold is serious enough, applying a fungicide. We do suggest coming into Delaney's with a sample or a picture of the problem and we can help find the best solution and suggest products that will get the job done.
Ash, Cynthia. "Snow Molds in Lawns." University of Minnesota. http://www.extension.umn.edu/garden/yard-garden/lawns/snow-molds-in-lawns/
Smith, Michael. The Ortho Problem Solver, 4th Edition. Monsanto Company, 1994.