When to plant Watermelon in Zone 6b
In Zone 6b, Watermelon: start seeds indoors around Mar 18–Apr 1; transplant outdoors around Apr 29–May 6; direct sow outdoors around Apr 22–May 6. Expect to harvest around Jul 16–Jul 30.
| Step | When |
|---|---|
| Start seeds indoors | Mar 18 – Apr 1 |
| Transplant outdoors | Apr 29 – May 6 |
| Direct sow outdoors | Apr 22 – May 6 |
| Harvest | Jul 16 – Jul 30 |
| Harvest | Jul 23 – Jul 30 |
Tip: Needs heat and a long season. In short-summer zones, start indoors and use black plastic to warm the soil.
Zone 6b averages a last spring frost around Apr 15 and a first fall frost around Oct 25. These are zone averages — look up your ZIP for your exact area.
See the full Zone 6b calendar in the tool →