Frost dates for Seattle, Washington
In a typical year, Seattle’s last spring frost lands around Mar 13 and the first fall frost around Nov 17, a growing season of about 249 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 9a.
| Odds | Last spring frost | First fall frost |
|---|---|---|
| 10 percent | Feb 20 | Nov 1 |
| 50 percent | Mar 13 | Nov 17 |
| 90 percent | Apr 1 | Dec 6 |
A 10 percent year is an early year, a 90 percent year a late one. Frost-sensitive planting usually waits for the 90 percent side of the last-frost band.
Soil in Seattle is typically around 67°F at 4 inches this time of year, estimated from the last two weeks of normal air temperatures.
Plantable now in Seattle
- Broccoli (Green Magic)
- Brussels sprouts (Long Island Improved)
- Rutabaga (American Purple Top)
- Swiss chard (Ruby Red Chard)
- Beet (Detroit Dark Red)
- Chives (Common Chives)
- Calendula (Pacific Beauty)
- Scallion (White Lisbon)
Timing comes from the same temperature engine the app uses, run against Seattle’s normals for today.
Nearby cities
- Bellevue, WA (around Mar 8 to Nov 23)
- Kent, WA (around Mar 20 to Nov 10)
- Tacoma, WA (around Mar 8 to Nov 14)
- Vancouver, WA (around Mar 29 to Nov 9)
- Portland, OR (around Feb 25 to Dec 1)
Row & Bed is a plant reference built around your garden: your zone, your frost dates, your forecast, and a cited page for every variety in your beds.
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