Question 1

When should I plant watermelon in ZIP 89101?

Accepted Answer

In ZIP 89101, the main watermelon target is around Mar 15, based on the representative Las Vegas frost station and USDA zone 9a.

Question 2

When should I start watermelon seeds indoors in 89101?

Accepted Answer

Start watermelon seeds indoors in ZIP 89101 around Feb 8, about 21 days before the Mar 1 last-frost estimate.

Question 3

When is the last frost in Las Vegas?

Accepted Answer

Las Vegas (ZIP 89101) has an average last spring frost around Mar 1, based on the representative Las Vegas frost station.

Question 4

When is the first frost in Las Vegas?

Accepted Answer

Las Vegas (ZIP 89101) has an average first fall frost around Nov 20, leaving about 264 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	February 8, 2026	Start seeds under lights or in a bright indoor seed-starting space.
Transplant Outdoors	March 15, 2026	Move hardened-off seedlings outside after the frost-risk window.
Direct Sow	March 15, 2026	Sow seed outside when the crop and soil can handle the window.

Start watermelon seeds indoors around Feb 8

Watermelon dates for Las Vegas, NV