When to plant Kale in Zone 4b
In Zone 4b, Kale: start seeds indoors around Mar 29–Apr 12; transplant outdoors around Apr 26–May 10; direct sow outdoors around Apr 26–May 24; direct sow outdoors around Jun 30–Jul 28. Expect to harvest around Jun 25–Jul 9.
| Step | When |
|---|---|
| Start seeds indoors | Mar 29 – Apr 12 |
| Transplant outdoors | Apr 26 – May 10 |
| Direct sow outdoors | Apr 26 – May 24 |
| Direct sow outdoors | Jun 30 – Jul 28 |
| Harvest | Jun 25 – Jul 9 |
| Harvest | Jun 25 – Jul 23 |
| Harvest | Aug 29 – Sep 26 |
Tip: Frost actually sweetens the leaves. Excellent for fall and overwintering in mild zones.
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 →