When to plant Cauliflower in Zone 5a
In Zone 5a, Cauliflower: start seeds indoors around Mar 17–Mar 31; transplant outdoors around Apr 21–May 5. Expect to harvest around Jun 30–Jul 14.
| Step | When |
|---|---|
| Start seeds indoors | Mar 17 – Mar 31 |
| Transplant outdoors | Apr 21 – May 5 |
| Harvest | Jun 30 – Jul 14 |
Tip: Fussier than broccoli — it needs cool, even conditions. Blanch heads by tying leaves over them.
Zone 5a averages a last spring frost around May 5 and a first fall frost around Oct 1. These are zone averages — look up your ZIP for your exact area.
See the full Zone 5a calendar in the tool →