When to plant Broccoli in Zone 5a
In Zone 5a, Broccoli: start seeds indoors around Mar 17–Mar 31; transplant outdoors around Apr 21–May 5; direct sow outdoors around Jun 25–Jul 16. Expect to harvest around Jun 25–Jul 9.
| Step | When |
|---|---|
| Start seeds indoors | Mar 17 – Mar 31 |
| Transplant outdoors | Apr 21 – May 5 |
| Direct sow outdoors | Jun 25 – Jul 16 |
| Harvest | Jun 25 – Jul 9 |
| Harvest | Aug 29 – Sep 19 |
Tip: A cool-season brassica. Transplant in early spring or late summer; it bolts in midsummer heat.
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 →