When to plant Onion in Zone 7b
In Zone 7b, Onion: start seeds indoors around Jan 21–Feb 4; transplant outdoors around Mar 4–Mar 18. Expect to harvest around Jun 12–Jun 26.
| Step | When |
|---|---|
| Start seeds indoors | Jan 21 – Feb 4 |
| Transplant outdoors | Mar 4 – Mar 18 |
| Harvest | Jun 12 – Jun 26 |
Tip: Day-length sensitive — match the variety (long/short day) to your latitude for big bulbs.
Zone 7b averages a last spring frost around Apr 1 and a first fall frost around Nov 10. These are zone averages — look up your ZIP for your exact area.
See the full Zone 7b calendar in the tool →