When to plant Basil in Zone 9b
In Zone 9b, Basil: start seeds indoors around Jan 4–Jan 18; transplant outdoors around Feb 22–Mar 8. Expect to harvest around Apr 23–May 7.
| Step | When |
|---|---|
| Start seeds indoors | Jan 4 – Jan 18 |
| Transplant outdoors | Feb 22 – Mar 8 |
| Harvest | Apr 23 – May 7 |
Tip: Extremely frost-sensitive. Keep indoors until nights are reliably warm, then pinch often.
Zone 9b averages a last spring frost around Feb 15 and a first fall frost around Dec 15. These are zone averages — look up your ZIP for your exact area.
See the full Zone 9b calendar in the tool →