When to plant Basil in Zone 5a
In Zone 5a, Basil: start seeds indoors around Mar 24–Apr 7; transplant outdoors around May 12–May 26. Expect to harvest around Jul 11–Jul 25.
| Step | When |
|---|---|
| Start seeds indoors | Mar 24 – Apr 7 |
| Transplant outdoors | May 12 – May 26 |
| Harvest | Jul 11 – Jul 25 |
Tip: Extremely frost-sensitive. Keep indoors until nights are reliably warm, then pinch often.
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 →