GrowZone

Crop by USDA zone

When to plant kale in zone 6b

In USDA zone 6b, plant kale around Apr 16, after the representative last frost near Apr 30. Start seeds indoors around Mar 26.

This page summarizes the supported ZIPs in zone 6b. 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 Columbus, OH

StepDateHow to use it
Start IndoorsMarch 26, 2026Start seeds under lights or in a bright indoor seed-starting space.
Transplant OutdoorsApril 16, 2026Move hardened-off seedlings outside after the frost-risk window.
Direct SowApril 9, 2026Sow seed outside when the crop and soil can handle the window.
Columbus, OH · Zone 6b Kale Apr 16 Open ZIP-specific answer · last frost Apr 30 Cleveland, OH · Zone 6b Kale Apr 21 Open ZIP-specific answer · last frost May 5 Indianapolis, IN · Zone 6b Kale Apr 11 Open ZIP-specific answer · last frost Apr 25 Detroit, MI · Zone 6b Kale Apr 21 Open ZIP-specific answer · last frost May 5 Kansas City, MO · Zone 6b Kale Apr 1 Open ZIP-specific answer · last frost Apr 15