When to plant Rosemary in Zone 8b
In Zone 8b, Rosemary: start seeds indoors around Jan 4–Jan 18; transplant outdoors around Mar 29–Apr 12. Expect to harvest around Jun 27–Jul 11.
| Step | When |
|---|---|
| Start seeds indoors | Jan 4 – Jan 18 |
| Transplant outdoors | Mar 29 – Apr 12 |
| Harvest | Jun 27 – Jul 11 |
Tip: Slow from seed and frost-tender in cold zones — most gardeners start from a plant and overwinter indoors.
Zone 8b averages a last spring frost around Mar 15 and a first fall frost around Nov 25. These are zone averages — look up your ZIP for your exact area.
See the full Zone 8b calendar in the tool →