When to plant Cabbage in Zone 4a
In Zone 4a, Cabbage: start seeds indoors around Mar 20–Apr 3; transplant outdoors around May 1–May 15. Expect to harvest around Jul 10–Jul 24.
| Step | When |
|---|---|
| Start seeds indoors | Mar 20 – Apr 3 |
| Transplant outdoors | May 1 – May 15 |
| Harvest | Jul 10 – Jul 24 |
Tip: Start indoors and transplant while it's still cool. Steady moisture prevents split heads.
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 →