When to plant Thyme in Zone 5a
In Zone 5a, Thyme: start seeds indoors around Mar 10–Mar 24; transplant outdoors around May 5–May 19. Expect to harvest around Jul 24–Aug 7.
| Step | When |
|---|---|
| Start seeds indoors | Mar 10 – Mar 24 |
| Transplant outdoors | May 5 – May 19 |
| Harvest | Jul 24 – Aug 7 |
Tip: Perennial in most zones. Loves lean, well-drained soil — don't overwater or overfeed.
Zone 5a averages a last spring frost around May 5 and a first fall frost around Oct 1. These are zone averages — look up your ZIP for your exact area.
See the full Zone 5a calendar in the tool →