When to plant Broccoli in Zone 1a
In Zone 1a, Broccoli: start seeds indoors around Apr 27–May 11; transplant outdoors around Jun 1–Jun 15; direct sow outdoors around May 9–May 30. Expect to harvest around Jul 13–Aug 3.
| Step | When |
|---|---|
| Start seeds indoors | Apr 27 – May 11 |
| Transplant outdoors | Jun 1 – Jun 15 |
| Direct sow outdoors | May 9 – May 30 |
| Harvest | Jul 13 – Aug 3 |
| Harvest | Aug 5 – Aug 19 |
Tip: A cool-season brassica. Transplant in early spring or late summer; it bolts in midsummer heat.
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 →