Question 1

When should I plant watermelon in ZIP 93721?

Accepted Answer

In ZIP 93721, the main watermelon target is around Mar 6, based on the representative Fresno frost station and USDA zone 9b.

Question 2

When should I start watermelon seeds indoors in 93721?

Accepted Answer

Start watermelon seeds indoors in ZIP 93721 around Jan 30, about 21 days before the Feb 20 last-frost estimate.

Question 3

When is the last frost in Fresno?

Accepted Answer

Fresno (ZIP 93721) has an average last spring frost around Feb 20, based on the representative Fresno frost station.

Question 4

When is the first frost in Fresno?

Accepted Answer

Fresno (ZIP 93721) has an average first fall frost around Nov 25, leaving about 278 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	January 30, 2026	Start seeds under lights or in a bright indoor seed-starting space.
Transplant Outdoors	March 6, 2026	Move hardened-off seedlings outside after the frost-risk window.
Direct Sow	March 6, 2026	Sow seed outside when the crop and soil can handle the window.

Start watermelon seeds indoors around Jan 30

Watermelon dates for Fresno, CA