GrowZone

Crop by USDA zone

When to plant kale in zone 12b

In USDA zone 12b, plant kale around Dec 18, after the representative last frost near Jan 1. Start seeds indoors around Nov 27.

This page summarizes the supported ZIPs in zone 12b. Your exact city can move earlier or later, so use the ZIP lookup for the frost-station-specific answer.

Get exact kale dates by ZIP code.

Seed starting schedule

Kale dates for Honolulu, HI

StepDateHow to use it
Start IndoorsNovember 27, 2025Start seeds under lights or in a bright indoor seed-starting space.
Transplant OutdoorsDecember 18, 2025Move hardened-off seedlings outside after the frost-risk window.
Direct SowDecember 11, 2025Sow seed outside when the crop and soil can handle the window.
Honolulu, HI · Zone 12b Kale Dec 18 Open ZIP-specific answer · last frost Jan 1