When to plant Tomato in Zone 1a
In Zone 1a, Tomato: start seeds indoors around Apr 27–May 11; transplant outdoors around Jun 22–Jun 29. Expect to harvest around Sep 5–Sep 12.
| Step | When |
|---|---|
| Start seeds indoors | Apr 27 – May 11 |
| Transplant outdoors | Jun 22 – Jun 29 |
| Harvest | Sep 5 – Sep 12 |
Tip: Start indoors 6 weeks before last frost. Don't transplant until nights stay above 50°F (10°C).
Zone 1a averages a last spring frost around Jun 15 and a first fall frost around Aug 15. These are zone averages — look up your ZIP for your exact area.
See the full Zone 1a calendar in the tool →