When to plant Basil in Zone 1b
In Zone 1b, Basil: start seeds indoors around Apr 29–May 13; transplant outdoors around Jun 17–Jul 1. Expect to harvest around Aug 16–Aug 30.
| Step | When |
|---|---|
| Start seeds indoors | Apr 29 – May 13 |
| Transplant outdoors | Jun 17 – Jul 1 |
| Harvest | Aug 16 – Aug 30 |
Tip: Extremely frost-sensitive. Keep indoors until nights are reliably warm, then pinch often.
Zone 1b averages a last spring frost around Jun 10 and a first fall frost around Aug 20. These are zone averages — look up your ZIP for your exact area.
See the full Zone 1b calendar in the tool →