Best days to plant grass seed, by city
Cool-season grass seed: soil about 50–65°F, highs 60–80°F, no washout rain. Pick a city for a live 7-day verdict from the National Weather Service forecast and the months that usually work there.
Alabama
Arizona
Arkansas
California
Colorado
Connecticut
District of Columbia
Florida
Georgia
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
Louisiana
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Nebraska
Nevada
New Mexico
Oklahoma
Oregon
Rhode Island
South Carolina
Virginia
Washington
Wisconsin
The rules Fairsky uses
- GO when estimated soil is 50–65°F and the next five days average highs of 60–80°F. (Fairsky default)
- NO when estimated soil is under 45°F or a hard freeze (28°F or colder) is ahead. (Fairsky default)
- Hold off when an inch or more of rain is due in the next 24 hours; it washes seed away. (Fairsky default)
- Hot (soil above 70°F or highs above 85°F) means slow, stressed germination for cool-season grass.
- Wind under 20 mph while spreading. (Fairsky default)
Your product's label wins.
Sources: Purdue Turf: optimum temperatures for seed germination
The app covers 47 activities in all: see every activity and its rules.
Fairsky is not a substitute for official warnings. For warnings, go to weather.gov.
Live forecasts: National Weather Service / NOAA (public domain), fetched by your browser. Climate averages: NOAA NCEI U.S. Climate Normals, 1991–2020 (public domain). Activity thresholds: product data sheets, ACI and university extension guidance, linked on each page; your product’s label wins.