Upkeep PlanTimed by soil temperature

Is it time to apply crabgrass pre-emergent in Pennsylvania?

Northeast region · cool-season grass

Soil temperature today

Measured

56.7°F

Measured at 5 cm by NOAA USCRN station NY_Ithaca_13_E, reading of 2026-10-16. How we get this number.

Crabgrass pre-emergent is applied when soil crosses 52 to 58 degrees FahrenheitHorizontal temperature scale from 40 to 80 degrees Fahrenheit. Cool-season seeding window: 50–65°F. Crabgrass pre-emergent window: 52–58°F (measured data only on this site). Warm-season seeding: above 65°F. Current reading: 56.7°F.40°45°50°55°60°65°70°75°80°
Where today's reading sits against the crabgrass pre-emergent window.

Not yet — window is closed

crabgrass pre-emergent is a spring job.

Timed to soil crossing ~55°F on the way up. Only shown where we have a measured reading.

Crabgrass pre-emergent guide

Timed to soil crossing ~55°F on the way up. Only shown where we have a measured reading.

Read the full guide →
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