When to plant Rosemary in Zone 2b
In Zone 2b, Rosemary: start seeds indoors around Mar 21–Apr 4; transplant outdoors around Jun 13–Jun 27. Expect to harvest around Sep 11–Sep 25.
| Step | When |
|---|---|
| Start seeds indoors | Mar 21 – Apr 4 |
| Transplant outdoors | Jun 13 – Jun 27 |
| Harvest | Sep 11 – Sep 25 |
Tip: Slow from seed and frost-tender in cold zones — most gardeners start from a plant and overwinter indoors.
Zone 2b averages a last spring frost around May 30 and a first fall frost around Sep 1. These are zone averages — look up your ZIP for your exact area.
See the full Zone 2b calendar in the tool →