When to plant Brussels Sprouts in Zone 10b
In Zone 10b, Brussels Sprouts: start seeds indoors around Dec 4–Dec 18; transplant outdoors around Jan 8–Jan 22. Expect to harvest around Apr 18–May 2.
| Step | When |
|---|---|
| Start seeds indoors | Dec 4 – Dec 18 |
| Transplant outdoors | Jan 8 – Jan 22 |
| Harvest | Apr 18 – May 2 |
Tip: A long-season crop best for fall — the sprouts sweeten after a frost or two.
Zone 10b averages a last spring frost around Jan 15 and a first fall frost around Dec 31. These are zone averages — look up your ZIP for your exact area.
See the full Zone 10b calendar in the tool →