GrowZone

Crop by USDA zone

When to plant cilantro in zone 6a

In USDA zone 6a, plant cilantro around Apr 21, after the representative last frost near May 5.

This page summarizes the supported ZIPs in zone 6a. Your exact city can move earlier or later, so use the ZIP lookup for the frost-station-specific answer.

Get exact cilantro dates by ZIP code.

Seed starting schedule

Cilantro dates for Denver, CO

StepDateHow to use it
Direct SowApril 21, 2026Sow seed outside when the crop and soil can handle the window.
Milwaukee, WI · Zone 6a Cilantro Apr 26 Open ZIP-specific answer · last frost May 10 Chicago, IL · Zone 6a Cilantro Apr 11 Open ZIP-specific answer · last frost Apr 25 Omaha, NE · Zone 6a Cilantro Apr 21 Open ZIP-specific answer · last frost May 5 Aurora, CO · Zone 6a Cilantro Apr 21 Open ZIP-specific answer · last frost May 5 Denver, CO · Zone 6a Cilantro Apr 21 Open ZIP-specific answer · last frost May 5 Colorado Springs, CO · Zone 6a Cilantro May 1 Open ZIP-specific answer · last frost May 15