When to plant Brussels Sprouts in Zone 1b
In Zone 1b, Brussels Sprouts: start seeds indoors around Apr 29–May 13; transplant outdoors around Jun 3–Jun 17. Expect to harvest around Sep 11–Sep 25.
| Step | When |
|---|---|
| Start seeds indoors | Apr 29 – May 13 |
| Transplant outdoors | Jun 3 – Jun 17 |
| Harvest | Sep 11 – Sep 25 |
Tip: A long-season crop best for fall — the sprouts sweeten after a frost or two.
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 →