When to plant Cauliflower in Zone 6a
In Zone 6a, Cauliflower: start seeds indoors around Mar 3–Mar 17; transplant outdoors around Apr 7–Apr 21. Expect to harvest around Jun 16–Jun 30.
| Step | When |
|---|---|
| Start seeds indoors | Mar 3 – Mar 17 |
| Transplant outdoors | Apr 7 – Apr 21 |
| Harvest | Jun 16 – Jun 30 |
Tip: Fussier than broccoli — it needs cool, even conditions. Blanch heads by tying leaves over them.
Zone 6a averages a last spring frost around Apr 21 and a first fall frost around Oct 17. These are zone averages — look up your ZIP for your exact area.
See the full Zone 6a calendar in the tool →