Question 1

When should I plant watermelon in ZIP 37203?

Accepted Answer

In ZIP 37203, the main watermelon target is around Apr 24, based on the representative Nashville frost station and USDA zone 7b.

Question 2

When should I start watermelon seeds indoors in 37203?

Accepted Answer

Start watermelon seeds indoors in ZIP 37203 around Mar 20, about 21 days before the Apr 10 last-frost estimate.

Question 3

When is the last frost in Nashville?

Accepted Answer

Nashville (ZIP 37203) has an average last spring frost around Apr 10, based on the representative Nashville frost station.

Question 4

When is the first frost in Nashville?

Accepted Answer

Nashville (ZIP 37203) has an average first fall frost around Oct 25, leaving about 198 frost-free days.

Question 5

Is this a guaranteed planting date?

Accepted Answer

No. GrowZone uses frost-date estimates, hardiness zones, and crop timing rules for planning. Local microclimates and current weather can shift the right date.

Step	Date	How to use it
Start Indoors	March 20, 2026	Start seeds under lights or in a bright indoor seed-starting space.
Transplant Outdoors	April 24, 2026	Move hardened-off seedlings outside after the frost-risk window.
Direct Sow	April 24, 2026	Sow seed outside when the crop and soil can handle the window.

Start watermelon seeds indoors around Mar 20

Watermelon dates for Nashville, TN