When to plant Basil in Zone 10b
In Zone 10b, Basil: start seeds indoors around Dec 4–Dec 18; transplant outdoors around Jan 22–Feb 5. Expect to harvest around Mar 23–Apr 6.
| Step | When |
|---|---|
| Start seeds indoors | Dec 4 – Dec 18 |
| Transplant outdoors | Jan 22 – Feb 5 |
| Harvest | Mar 23 – Apr 6 |
Tip: Extremely frost-sensitive. Keep indoors until nights are reliably warm, then pinch often.
Zone 10b averages a last spring frost around Jan 15 and a first fall frost around Dec 31. These are zone averages — look up your ZIP for your exact area.
See the full Zone 10b calendar in the tool →