When to plant Lettuce in Zone 4b
In Zone 4b, Lettuce: direct sow outdoors around Apr 12–May 10; direct sow outdoors around Jul 28–Aug 11. Expect to harvest around May 27–Jun 24.
| Step | When |
|---|---|
| Direct sow outdoors | Apr 12 – May 10 |
| Direct sow outdoors | Jul 28 – Aug 11 |
| Harvest | May 27 – Jun 24 |
| Harvest | Sep 11 – Sep 25 |
Tip: A cool-season crop. Sow early and again in late summer for fall; it bolts in summer heat.
Zone 4b averages a last spring frost around May 10 and a first fall frost around Sep 22. These are zone averages — look up your ZIP for your exact area.
See the full Zone 4b calendar in the tool →