GrowZone

Crop by USDA zone

When to plant basil in zone 9a

In USDA zone 9a, plant basil around Mar 11, after the representative last frost near Mar 1. Start seeds indoors around Jan 25.

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 basil dates by ZIP code.

Seed starting schedule

Basil dates for Las Vegas, NV

StepDateHow to use it
Start IndoorsJanuary 25, 2026Start seeds under lights or in a bright indoor seed-starting space.
Transplant OutdoorsMarch 11, 2026Move hardened-off seedlings outside after the frost-risk window.
Direct SowMarch 11, 2026Sow seed outside when the crop and soil can handle the window.
Jacksonville, FL · Zone 9a Basil Mar 11 Open ZIP-specific answer · last frost Mar 1 San Antonio, TX · Zone 9a Basil Mar 11 Open ZIP-specific answer · last frost Mar 1 Las Vegas, NV · Zone 9a Basil Mar 11 Open ZIP-specific answer · last frost Mar 1 Portland, OR · Zone 9a Basil Apr 11 Open ZIP-specific answer · last frost Apr 1 Seattle, WA · Zone 9a Basil Mar 30 Open ZIP-specific answer · last frost Mar 20