Growing in Seattle
- USDA zone (2023)
- 8b-9a
- Median last frost
- March 20
- Median first frost
- November 15
- Growing season
- ~240 days
Frost dates are medians from NOAA climate normals: in half of years, frost comes later. The windows below are computed from each crop's planting rules against this city's dates, treat them as the center of the target, not the edges.
Tomato in Seattle
| Step | Window | Notes |
|---|---|---|
| Start seed indoors | January 23 to February 6 | |
| Transplant out | March 20 to April 10 | soil ≥ 60°F |
→ Full tomato calendar & suitable varieties for Seattle
Pepper in Seattle
| Step | Window | Notes |
|---|---|---|
| Start seed indoors | January 9 to January 23 | |
| Transplant out | March 27 to April 17 | soil ≥ 65°F |
→ Full pepper calendar & suitable varieties for Seattle
Other crops with rules for this climate
Data sources
Evidence: 2 sources, all independent references.
- USDA Plant Hardiness Zone Map (2023) · USDA Agricultural Research Service / Oregon State PRISM (2023), University or Government
- U.S. Climate Normals (1991-2020) · NOAA National Centers for Environmental Information (2021), University or Government