When to plant Lettuce in Zone 4a
In Zone 4a, Lettuce: direct sow outdoors around Apr 17–May 15; direct sow outdoors around Jul 24–Aug 7. Expect to harvest around Jun 1–Jun 29.
| Step | When |
|---|---|
| Direct sow outdoors | Apr 17 – May 15 |
| Direct sow outdoors | Jul 24 – Aug 7 |
| Harvest | Jun 1 – Jun 29 |
| Harvest | Sep 7 – Sep 21 |
Tip: A cool-season crop. Sow early and again in late summer for fall; it bolts in summer heat.
Zone 4a averages a last spring frost around May 15 and a first fall frost around Sep 18. These are zone averages — look up your ZIP for your exact area.
See the full Zone 4a calendar in the tool →