When to plant Basil in Zone 3b
In Zone 3b, Basil: start seeds indoors around Apr 8–Apr 22; transplant outdoors around May 27–Jun 10. Expect to harvest around Jul 26–Aug 9.
| Step | When |
|---|---|
| Start seeds indoors | Apr 8 – Apr 22 |
| Transplant outdoors | May 27 – Jun 10 |
| Harvest | Jul 26 – Aug 9 |
Tip: Extremely frost-sensitive. Keep indoors until nights are reliably warm, then pinch often.
Zone 3b averages a last spring frost around May 20 and a first fall frost around Sep 12. These are zone averages — look up your ZIP for your exact area.
See the full Zone 3b calendar in the tool →