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The 2-inch soil temperature near Jber, AK is currently 34.1°F, a Soil Temps location estimate for these coordinates; the nearest in-ground station (Moose Inc) is 251 mi E. That is about 4°F cooler than typical for this date.
Hold off on seeding: soil is under 45°F, too cold for reliable germination regardless of trend. Wait for sustained warming above 50°F before seeding cool-season grasses.
What you need to check
Cool-season grasses share a seeding band, with tall fescue wanting the warmer end of it; warm-season grasses run higher. Germination floors come from university extension guidance and the band tops are our establishment cutoffs; the dates come from Jber's own station climatology.
| Species | Seeding soil temp | Days to germinate | Right now |
|---|---|---|---|
| Kentucky bluegrass | 60–70°F | 14-30 | Too cold |
| Tall fescue | 60–70°F | 7-12 | Too cold |
| Perennial ryegrass | 60–70°F | 5-10 | Too cold |
| Fine fescue | 60–70°F | 7-14 | Too cold |
| Bermudagrass | 75–90°F | 10-30 | Too cold |
| Zoysia | 75–90°F | varies | Too cold |
| Buffalograss | 75–90°F | 14-30 | Too cold |
| Centipede | 75–90°F | varies | Too cold |
“Right now” compares each species’ band to the current 2-inch modeled estimate of 34.1°F.
Cool-season grasses (tall fescue, Kentucky bluegrass, perennial ryegrass) germinate best when the 2-inch soil temperature stays between 50°F and 65°F. The ideal window is early to mid-spring, or early fall when soil cools back into this range. Fall seeding has less weed competition and more consistent moisture.
Warm-season grasses (Bermuda, zoysia, St. Augustine, centipede) need soil temperatures of65°F or higher for germination. These grasses are best seeded in late spring through early summer when soil has fully warmed.
Use a soil thermometer at 2 inches depth, measured mid-morning after the sun has warmed the surface. Take readings in several spots and average them. One warm day does not mean soil is ready; look for a sustained trend across 3–5 days.
Enter your city or ZIP code for the current 2-inch soil temperature near you, measured at the nearest USDA SCAN, USDA CSCAN, or NOAA USCRN station when one is in range.