When to plant Basil in Zone 3a
In Zone 3a, Basil: start seeds indoors around Apr 13–Apr 27; transplant outdoors around Jun 1–Jun 15. Expect to harvest around Jul 31–Aug 14.
| Step | When |
|---|---|
| Start seeds indoors | Apr 13 – Apr 27 |
| Transplant outdoors | Jun 1 – Jun 15 |
| Harvest | Jul 31 – Aug 14 |
Tip: Extremely frost-sensitive. Keep indoors until nights are reliably warm, then pinch often.
Zone 3a averages a last spring frost around May 25 and a first fall frost around Sep 8. These are zone averages — look up your ZIP for your exact area.
See the full Zone 3a calendar in the tool →