When to Plant Kohlrabi in Madison, Wisconsin (53708)
Location
Madison, Wisconsin
ZIP Code
53708
USDA Zone
5b
Last Frost
Saturday, April 25, 2026
📅 Planting Calendar
Start Seeds Indoors Saturday, March 28, 2026
Transplant Outdoors Saturday, April 11, 2026
Pro Tip: Start Kohlrabi seeds indoors 4 weeks before your last frost date for best results.
🌿 Plant Details
Scientific Name Brassica oleracea var. gongylodes
Days to Maturity 55 days
☀️ Growing Requirements
☀️
Sun
Full Sun
💧
Water
Regular
Seeds typically germinate in 7-14 days
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Growing Kohlrabi in Zone 5b
Kohlrabi (Brassica oleracea var. gongylodes) is a popular garden vegetable. In Madison, Wisconsin, which is in USDA Hardiness Zone 5b, you should start seeds indoors around Saturday, March 28, 2026.
Your average last frost date is Saturday, April 25, 2026. Plan to transplant your Kohlrabi seedlings outdoors around Saturday, April 11, 2026, about -2 weeks after your last frost date.