When to Plant Collard Green in Wisconsin
State
Wisconsin
Cities Covered
752
USDA Zones
3b, 4a, 4b, 5a, 5b, 6a
Plant Type
Indoor Start
📅 Planting Calendar for Wisconsin
Based on Adell (Zone 5b). Dates may vary by city.
Note: Wisconsin spans multiple zones (3b, 4a, 4b, 5a, 5b, 6a). Select your city below for more precise dates.
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Growing Collard Green in Wisconsin
Collard Green (Brassica oleracea) is a popular garden vegetable in Wisconsin. The state spans USDA Hardiness Zones 3b, 4a, 4b, 5a, 5b, 6a, so planting dates can vary significantly depending on your location.
For most of Wisconsin, you should start Collard Green seeds indoors around Saturday, February 28, 2026, then transplant outdoors around Saturday, May 9, 2026.
For the most accurate planting dates, enter your ZIP code on our homepage or select your city from the list above.