When to plant Cauliflower in Zone 5b
In Zone 5b, Cauliflower: start seeds indoors around Mar 12–Mar 26; transplant outdoors around Apr 16–Apr 30. Expect to harvest around Jun 25–Jul 9.
| Step | When |
|---|---|
| Start seeds indoors | Mar 12 – Mar 26 |
| Transplant outdoors | Apr 16 – Apr 30 |
| Harvest | Jun 25 – Jul 9 |
Tip: Fussier than broccoli — it needs cool, even conditions. Blanch heads by tying leaves over them.
Zone 5b averages a last spring frost around Apr 30 and a first fall frost around Oct 5. These are zone averages — look up your ZIP for your exact area.
See the full Zone 5b calendar in the tool →