When to plant Onion in Zone 7a
In Zone 7a, Onion: start seeds indoors around Jan 27–Feb 10; transplant outdoors around Mar 10–Mar 24. Expect to harvest around Jun 18–Jul 2.
| Step | When |
|---|---|
| Start seeds indoors | Jan 27 – Feb 10 |
| Transplant outdoors | Mar 10 – Mar 24 |
| Harvest | Jun 18 – Jul 2 |
Tip: Day-length sensitive — match the variety (long/short day) to your latitude for big bulbs.
Zone 7a averages a last spring frost around Apr 7 and a first fall frost around Nov 2. These are zone averages — look up your ZIP for your exact area.
See the full Zone 7a calendar in the tool →