When to plant Rosemary in Zone 2a
In Zone 2a, Rosemary: start seeds indoors around Mar 27–Apr 10; transplant outdoors around Jun 19–Jul 3. Expect to harvest around Sep 17–Oct 1.
| Step | When |
|---|---|
| Start seeds indoors | Mar 27 – Apr 10 |
| Transplant outdoors | Jun 19 – Jul 3 |
| Harvest | Sep 17 – Oct 1 |
Tip: Slow from seed and frost-tender in cold zones — most gardeners start from a plant and overwinter indoors.
Zone 2a averages a last spring frost around Jun 5 and a first fall frost around Aug 25. These are zone averages — look up your ZIP for your exact area.
See the full Zone 2a calendar in the tool →