Snow mold shows up as round, matted patches of straw colored grass, often with a gray or pinkish crust, right after the snow melts. In most lawns it is cosmetic: rake the patches lightly once the surface dries so air and sun reach the crowns, give the grass two to three weeks of spring growth, and reseed only the spots that stay brown. Fungicide is rarely needed on home lawns. Prevention is mostly about how you mow, feed, and clear the lawn before the first lasting snow.
Gray snow mold or pink snow mold?
Two different fungi cause most snow mold damage, and the difference decides how worried you should be.
| Sign | Gray snow mold | Pink snow mold |
|---|---|---|
| Color of the fuzz at melt | White to gray | White turning salmon pink in light |
| Patch size | 3 to 12 inches, can merge | 2 to 8 inches, can merge |
| Needs snow cover? | Yes, usually 60 days or more | No, also active in cold, wet weather without snow |
| Damage | Usually leaf blades only; crowns survive | Can kill crowns, especially in bentgrass and ryegrass |
| Tiny hard dots in leaves | Often present (sclerotia) | Absent |
Gray snow mold looks dramatic but the plants nearly always recover. Pink snow mold is the one that can leave dead spots that need seed.
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Find My Plants →How to repair it in spring
- Wait for the surface to dry. Raking soggy turf tears out crowns and makes things worse.
- Rake lightly with a flexible spring-tine rake to lift the matted blades and break up the crust. The goal is airflow, not dethatching.
- Spread out snow piles left from shoveling and plowing so the last melt does not keep patches wet for weeks.
- Give it time. Most patches green up within two to three weeks once soil warms.
- Reseed what stays brown. Scratch the soil, spread seed or a seed and mulch patch mix, and keep it evenly moist. Our guide to overseeding the lawn in spring covers rates and timing.
- Feed lightly, not heavily, once the grass is actively growing. A big early dose of nitrogen can feed pink snow mold during cool, wet spells.
Shop snow mold cleanup gear on Amazon
A flexible spring-tine rake to fluff matted patches, a seed and mulch patch mix for spots that stay brown, and labeled lawn fungicide granules for lawns with repeat pink snow mold. We may earn a commission at no extra cost to you.
Amazon · Spring-tine leaf rake Amazon · Lawn patch repair mix Amazon · Lawn fungicide granules
Prevention before the snow
Snow mold thrives on long, matted grass sitting under a heavy, wet blanket. Most of the fix happens in late fall.
- Keep mowing until growth stops, and lower the final cut to about 2 to 2.5 inches for cool-season lawns. Our guide to the last mow height for fall lawns explains why.
- Clear leaves before the first lasting snow. A mat of wet leaves under snow is ideal habitat for the fungus.
- Time fall fertilizer so the grass is not pushing soft new growth right before snow. Apply the late feeding when top growth has slowed, at the rate on the bag.
- Do not pile shoveled snow in the same lawn spot every storm. Spread it, or pile it on a bed or gravel area.
- Reduce thatch if it is over half an inch thick, since thatch holds moisture at the crowns. See the lawn dethatching guide.
- Improve drainage in low spots where meltwater sits.
When a fungicide makes sense
Fungicides for snow mold work as a preventive, applied in late fall before snow cover. They do little once the damage shows. For a typical home lawn with gray snow mold, skip them. Consider a labeled product only if the same areas lose turf to pink snow mold year after year despite good mowing and leaf cleanup.
Safety with lawn fungicides
Treat any lawn fungicide as a hazardous chemical.
- Read and follow the full label: the rate, the protective gear it lists, and the reentry interval before people or pets use the lawn.
- Wear chemical resistant gloves, long sleeves, and eye protection while loading the spreader. Wash hands and clothes afterward.
- Keep children and pets off the treated area until the label says it is dry or watered in, and sweep granules off walks and driveways so they do not wash into drains.
- Store the bag sealed, off the floor, and locked away from kids and pets.
- If a child swallows or splashes any garden chemical, call Poison Control at 1-800-222-1222. If a pet eats it, call your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435.
Raking is gentle work, but take breaks and lift with your legs when moving bags of seed.
Other lawn problems that look like snow mold
Vole runways are winding trails of dead grass, not circles; see vole damage in the lawn. Brown strips along walks and curbs are usually deicing salt; see road salt damage on lawns. Dog urine spots are small and often have a dark green ring. The lawn disease identification guide covers the rest.
Bottom line
Snow mold is mostly a springtime eyesore. Rake the patches once they dry, give the lawn a few weeks of growth, and reseed only the spots that stay brown. Mow a little shorter at the end of the season, clear leaves before snow, and spread out snow piles, and most lawns will not see it again.
Related reading
- Spring lawn care by zone
- Moss in the lawn: causes and control
- Fall lawn care by zone
- Lawn renovation guide
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