Snow mold is caused by lack of air movement in the soil due to frozen ground and compaction. It may occur in the spring even if there has been little or no snow. Spore populations often establish in early spring and if not treated with nitrogen, will kill the grass.
How to remove snow mold:
- Rake the affected area lightly
- Fertilize in the spring as early as you are legally allowed to with Green-Up (as long as the ground is not frozen).
- Then in 4-6 weeks follow that with Green-Up Lawn Food plus Crabgrass Preventer.
How to prevent snow mold in the future:
- Apply a low nitrogen fertilizer in the fall
- Apply an additional application of Love Your Soil if snow mold has been a problem in the past.
- Cut lawn 1.5 to 2 inches when mowing for the last time for the year.