Live soil temperature · 2 inches down

Soil temperature in Knoxville, TN

Right now · 37917

79.3°FActive

30°40°50°60°70°80°90°

Pre-emergent window (50-55°F)Crabgrass germinates near 60°F

Crabgrass pre-emergent: Window has likely passed: soil is at or above 60°F. Pre-emergent is a product that stops weed seeds before they sprout, so it only works ahead of germination.

By depth

Surface: 76°F
2 in depth: 79.3°F
6 in depth: 79°F

Past 7 days · daily average

2 in depthSurface6 in depthPre-emergent window (50-55°F)

Interpretation

What this means for your grass.

Bermuda: Bermuda is in active growth. Your full fertilizer, herbicide, and PGR program is appropriate.
Zoysia: Zoysia is in active growth. Full program is appropriate, confirm visual greenup before applying nitrogen, as zoysia breaks later than bermuda.
St. Augustine: St. Augustine is in active growth. Full fertilizer program is appropriate. Watch for chinch bugs as temps climb.
Cool-season: Cool-season grass is likely heat-stressed or dormant. Hold fertilizer, maintain irrigation, and wait for fall.

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Weather data from Open-Meteo. Timing guidance follows the sources on when to apply pre-emergent and how to use soil temperature.Data as of Wed, 02 Sep 2026 14:31:54 GMT