GrowZone

Crop by USDA zone

When to plant watermelon in zone 10b

In USDA zone 10b, plant watermelon around Feb 3, after the representative last frost near Jan 20. Start seeds indoors around Dec 30.

This page summarizes the supported ZIPs in zone 10b. Your exact city can move earlier or later, so use the ZIP lookup for the frost-station-specific answer.

Get exact watermelon dates by ZIP code.

Seed starting schedule

Watermelon dates for Anaheim, CA

StepDateHow to use it
Start IndoorsDecember 30, 2025Start seeds under lights or in a bright indoor seed-starting space.
Transplant OutdoorsFebruary 3, 2026Move hardened-off seedlings outside after the frost-risk window.
Direct SowFebruary 3, 2026Sow seed outside when the crop and soil can handle the window.
Los Angeles, CA · Zone 10b Watermelon Feb 3 Open ZIP-specific answer · last frost Jan 20 Long Beach, CA · Zone 10b Watermelon Feb 3 Open ZIP-specific answer · last frost Jan 20 San Diego, CA · Zone 10b Watermelon Feb 13 Open ZIP-specific answer · last frost Jan 30 Anaheim, CA · Zone 10b Watermelon Feb 3 Open ZIP-specific answer · last frost Jan 20