When to plant Kale in Zone 4a
In Zone 4a, Kale: start seeds indoors around Apr 3–Apr 17; transplant outdoors around May 1–May 15; direct sow outdoors around May 1–May 29; direct sow outdoors around Jun 26–Jul 24. Expect to harvest around Jun 30–Jul 14.
| Step | When |
|---|---|
| Start seeds indoors | Apr 3 – Apr 17 |
| Transplant outdoors | May 1 – May 15 |
| Direct sow outdoors | May 1 – May 29 |
| Direct sow outdoors | Jun 26 – Jul 24 |
| Harvest | Jun 30 – Jul 14 |
| Harvest | Jun 30 – Jul 28 |
| Harvest | Aug 25 – Sep 22 |
Tip: Frost actually sweetens the leaves. Excellent for fall and overwintering in mild zones.
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 →