When to plant Brussels Sprouts in Zone 5b
In Zone 5b, Brussels Sprouts: start seeds indoors around Mar 19–Apr 2; transplant outdoors around Apr 23–May 7. Expect to harvest around Aug 1–Aug 15.
| Step | When |
|---|---|
| Start seeds indoors | Mar 19 – Apr 2 |
| Transplant outdoors | Apr 23 – May 7 |
| Harvest | Aug 1 – Aug 15 |
Tip: A long-season crop best for fall — the sprouts sweeten after a frost or two.
Zone 5b averages a last spring frost around Apr 30 and a first fall frost around Oct 5. These are zone averages — look up your ZIP for your exact area.
See the full Zone 5b calendar in the tool →