When to plant Broccoli in Zone 9b
In Zone 9b, Broccoli: start seeds indoors around Dec 28–Jan 11; transplant outdoors around Feb 1–Feb 15; direct sow outdoors around Sep 8–Sep 29. Expect to harvest around Apr 7–Apr 21.
| Step | When |
|---|---|
| Start seeds indoors | Dec 28 – Jan 11 |
| Transplant outdoors | Feb 1 – Feb 15 |
| Direct sow outdoors | Sep 8 – Sep 29 |
| Harvest | Apr 7 – Apr 21 |
| Harvest | Nov 12 – Dec 3 |
Tip: A cool-season brassica. Transplant in early spring or late summer; it bolts in midsummer heat.
Zone 9b averages a last spring frost around Feb 15 and a first fall frost around Dec 15. These are zone averages — look up your ZIP for your exact area.
See the full Zone 9b calendar in the tool →