What happens to a lawn in winter in Minnesota

January 10, 2026

Grass turns dormant and essentially hibernates, due to cold it freezes. Causing grass be become brittle. Actions such as walking on frozen grass can cause damage which eventually will heal over time in the spring.
Snow insulates turf from cold temperatures reducing damage associated with extreme cold.
The most dangerous aspect of winter for your lawn is salt/ice melt . Rock Salt/ice melt is a great way to keep your walkways, steps, and paths clear of winter ice; However, it can have damaging effect upon your lawn. Typically appearing as brown spots near the edges of your paved areas, salt damage can happen anywhere the salt mixture ends up, meaning it can be moved by shoveling or blowing snow.
Frequent freeze thaw cycles may cause melting and ice buildup on the grass surface. Which may compaction and matting; creating an environment for snow mold in the spring. Overwatering in the fall, excessive thatch, and poor drainage can also contribute to snow mold growth.
De-thatching helps kill and prevent snow mold by removing the thick layer of dead organic matter (thatch) that traps moisture and fuels the fungus, allowing air and sunlight to reach the grass, drying it out, and breaking up the fungal mats for better recovery.
Winter’s effects on our lawns are not all negative; however, snow on your lawn can prevent moisture loss. Additionally, snow bring an increase in your lawns nitrogen levels by trapping the nitrogen during snowfall.
Rodents such as voles & mice tunnel under the snow feeding upon stems of trees, shrubs, and other plants.