GrowZone

Crop by USDA zone

When to plant tomatoes in zone 9a

In USDA zone 9a, plant tomatoes around Mar 8, after the representative last frost near Mar 1. Start seeds indoors around Jan 18.

This page summarizes the supported ZIPs in zone 9a. Your exact city can move earlier or later, so use the ZIP lookup for the frost-station-specific answer.

Get exact tomatoes dates by ZIP code.

Seed starting schedule

Tomatoes dates for Las Vegas, NV

StepDateHow to use it
Start IndoorsJanuary 18, 2026Start seeds under lights or in a bright indoor seed-starting space.
Transplant OutdoorsMarch 8, 2026Move hardened-off seedlings outside after the frost-risk window.
Jacksonville, FL · Zone 9a Tomatoes Mar 8 Open ZIP-specific answer · last frost Mar 1 San Antonio, TX · Zone 9a Tomatoes Mar 8 Open ZIP-specific answer · last frost Mar 1 Las Vegas, NV · Zone 9a Tomatoes Mar 8 Open ZIP-specific answer · last frost Mar 1 Portland, OR · Zone 9a Tomatoes Apr 8 Open ZIP-specific answer · last frost Apr 1 Seattle, WA · Zone 9a Tomatoes Mar 27 Open ZIP-specific answer · last frost Mar 20