What to plant in September — zone 10b
Zone 10b averages its last spring frost around January 15 and its first fall frost around December 30. Everything below is timed from those two dates, so it stays useful whether you're planting for summer or for a fall harvest.
Plan & order
- Inventory and order seedaround Sep 25
Sort what you already have, toss anything over 3 years old, and order early while varieties are in stock.
- Order fall seedaround Sep 1
Fall brassicas and greens get sown in the heat of summer — have the seed on hand before that window opens.
Start indoors for fall
Direct sow for fall
- Parsleyaround Sep 23
Fall parsley window opens — sowing now beats the last-minute date by a month of growth.
- Bush beanaround Sep 28
Fall bush bean window opens — sowing now beats the last-minute date by a month of growth.
- Lettucearound Sep 29
Succession sowing 3 of 3 — sow every 21 days for a steady cut.
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