What to plant in September in zone 9b
2 crops to start indoors, direct sow, or transplant in September in USDA hardiness zone 9b. Typical last spring frost around Feb 2, 2026, first fall frost around Dec 2, 2026 — exact dates vary by location within the zone.
Zone 9b covers a lot of ground. Enter your ZIP for September dates from your nearest weather station and a month-by-month calendar:
Plant out
Set out these crops (sets, tubers, or starts) now.
Keep going
Timings use NOAA 1991–2020 climate normals for a representative location (ZIP 94271) in zone 9b, computed with the same engine as GardenDraft’s in-app schedule. Guidance, not guarantees — your exact dates depend on your address.