SOIL · 2 IN DEPTH · SEATTLE, WA
Soil temperature in Seattle, WA
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.
SURFACE
59°F
2 IN DEPTH
63.1°F
6 IN DEPTH
65.8°F
PAST 7 DAYS · DAILY AVERAGE
2 in depthSurface6 in depth
What this means for your grass
Bermuda
Bermuda is breaking dormancy. Wait for visible green-up and consistent growth before resuming a full nitrogen or PGR program.
Zoysia
Zoysia is moving through the pre-emergent and early green-up window. Apply crabgrass pre-emergent before germination pressure, but wait for visible active growth before pushing fertility.
St. Augustine
St. Augustine is waking up. Pre-emergent timing is active. Most St. Augustine programs don't include PGR.
Cool-season
Ideal range for cool-season growth. Spring program is appropriate, fertilize lightly and watch for disease pressure.
Get alerted the day your window opens
The app watches your soil temperature every day and reminds you before timing windows open or close. Free to download.
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 Sun, 19 Jul 2026 04:35:08 GMT