When to plant Broccoli in Zone 1b
In Zone 1b, Broccoli: start seeds indoors around Apr 22–May 6; transplant outdoors around May 27–Jun 10; direct sow outdoors around May 14–Jun 4. Expect to harvest around Jul 18–Aug 8.
| Step | When |
|---|---|
| Start seeds indoors | Apr 22 – May 6 |
| Transplant outdoors | May 27 – Jun 10 |
| Direct sow outdoors | May 14 – Jun 4 |
| Harvest | Jul 18 – Aug 8 |
| Harvest | Jul 31 – Aug 14 |
Tip: A cool-season brassica. Transplant in early spring or late summer; it bolts in midsummer heat.
Zone 1b averages a last spring frost around Jun 10 and a first fall frost around Aug 20. These are zone averages — look up your ZIP for your exact area.
See the full Zone 1b calendar in the tool →