When to plant Cauliflower in Zone 1a
In Zone 1a, Cauliflower: start seeds indoors around Apr 27–May 11; transplant outdoors around Jun 1–Jun 15. Expect to harvest around Aug 10–Aug 24.
| Step | When |
|---|---|
| Start seeds indoors | Apr 27 – May 11 |
| Transplant outdoors | Jun 1 – Jun 15 |
| Harvest | Aug 10 – Aug 24 |
Tip: Fussier than broccoli — it needs cool, even conditions. Blanch heads by tying leaves over them.
Zone 1a averages a last spring frost around Jun 15 and a first fall frost around Aug 15. These are zone averages — look up your ZIP for your exact area.
See the full Zone 1a calendar in the tool →