When to plant Watermelon in Zone 1b
In Zone 1b, Watermelon: start seeds indoors around May 13–May 27; transplant outdoors around Jun 24–Jul 1; direct sow outdoors around Jun 17–Jul 1. Expect to harvest around Sep 10–Sep 24.
| Step | When |
|---|---|
| Start seeds indoors | May 13 – May 27 |
| Transplant outdoors | Jun 24 – Jul 1 |
| Direct sow outdoors | Jun 17 – Jul 1 |
| Harvest | Sep 10 – Sep 24 |
| Harvest | Sep 17 – Sep 24 |
Tip: Needs heat and a long season. In short-summer zones, start indoors and use black plastic to warm the soil.
Zone 1b averages a last spring frost around Jun 10 and a first fall frost around Aug 20. These are zone averages — look up your ZIP for your exact area.
See the full Zone 1b calendar in the tool →