Growing in Portland
- USDA zone (2023)
- 8b-9a
- Median last frost
- March 25
- Median first frost
- November 15
- Growing season
- ~235 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 Portland
| Step | Window | Notes |
|---|---|---|
| Start seed indoors | January 28 to February 11 | |
| Transplant out | March 25 to April 15 | soil ≥ 60°F |
→ Full tomato calendar & suitable varieties for Portland
Pepper in Portland
| Step | Window | Notes |
|---|---|---|
| Start seed indoors | January 14 to January 28 | |
| Transplant out | April 1 to April 22 | soil ≥ 65°F |
→ Full pepper calendar & suitable varieties for Portland
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