When to plant Thyme in Zone 9b
In Zone 9b, Thyme: start seeds indoors around Dec 21–Jan 4; transplant outdoors around Feb 15–Mar 1. Expect to harvest around May 6–May 20.
| Step | When |
|---|---|
| Start seeds indoors | Dec 21 – Jan 4 |
| Transplant outdoors | Feb 15 – Mar 1 |
| Harvest | May 6 – May 20 |
Tip: Perennial in most zones. Loves lean, well-drained soil — don't overwater or overfeed.
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 →