When to plant Rosemary in Zone 6b
In Zone 6b, Rosemary: start seeds indoors around Feb 4–Feb 18; transplant outdoors around Apr 29–May 13. Expect to harvest around Jul 28–Aug 11.
| Step | When |
|---|---|
| Start seeds indoors | Feb 4 – Feb 18 |
| Transplant outdoors | Apr 29 – May 13 |
| Harvest | Jul 28 – Aug 11 |
Tip: Slow from seed and frost-tender in cold zones — most gardeners start from a plant and overwinter indoors.
Zone 6b averages a last spring frost around Apr 15 and a first fall frost around Oct 25. These are zone averages — look up your ZIP for your exact area.
See the full Zone 6b calendar in the tool →