When to plant Tomato in Zone 3b
In Zone 3b, Tomato: start seeds indoors around Apr 1–Apr 15; transplant outdoors around May 27–Jun 3. Expect to harvest around Aug 10–Aug 17.
| Step | When |
|---|---|
| Start seeds indoors | Apr 1 – Apr 15 |
| Transplant outdoors | May 27 – Jun 3 |
| Harvest | Aug 10 – Aug 17 |
Tip: Start indoors 6 weeks before last frost. Don't transplant until nights stay above 50°F (10°C).
Zone 3b averages a last spring frost around May 20 and a first fall frost around Sep 12. These are zone averages — look up your ZIP for your exact area.
See the full Zone 3b calendar in the tool →