What can I plant in September in zone 10b?

In USDA hardiness zone 10b (last spring frost around Jan 9, 2026, first fall frost around Jan 5, 2026), September is a good time to direct sow outside annual ryegrass, crimson clover, hairy vetch, rye.

What to plant in September in zone 10b

4 crops to start indoors, direct sow, transplant, or harvest in September in USDA hardiness zone 10b. Typical last spring frost around Jan 9, 2026, first fall frost around Jan 5, 2026 — exact dates vary by location within the zone.

Want exact September dates for your address in zone 10b, a drag-and-drop bed layout, and sowing reminders? Enter your ZIP:

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Direct sow outside

Sow these straight into the garden bed this month.

Annual Ryegrass
Crimson Clover
Hairy Vetch
Rye

Keep going

Full zone 10b planting calendar →
What to plant in September (all zones) →
Succession planting for a continuous harvest →

Timings use NOAA 1991–2020 climate normals for a representative location (ZIP 90847) in zone 10b, computed with the same engine as GardenDraft’s in-app schedule. Guidance, not guarantees — your exact dates depend on your address.