Growing zone for 97123
Growing conditions
- USDA hardiness zone
- 8b
- Avg. minimum winter temp
- 15°F
- Median frost dates
- First ~Oct 23 · Last ~Apr 16
Frost dates: NOAA 1991–2020 Climate Normals, nearest station (PORTLAND-HILLSBORO AP, OR US, 5.6 km away) .
Planting windows and crop timing here are computed from USDA/NOAA climate data and the university extension sources cited below, not a site visit or soil test. Treat this as a starting point: local conditions vary, and a local nursery or extension office can advise on your exact site. See our full Disclaimer.
Frost-free growing season: about 190 days (last frost to first frost).
What grows in zone 8b, and when →
What to plant this month (September) →