When to Plant Butternut Squash 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, May 9, 2026
Pro Tip: Start Butternut Squash seeds indoors 4 weeks before your last frost date for best results.
🌿 Plant Details
Scientific Name Cucurbita moschata
Days to Maturity 100 days
☀️ Growing Requirements
☀️
Sun
Full Sun
💧
Water
Regular
Seeds typically germinate in 7-14 days
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Growing Butternut Squash in Zone 5b
Butternut Squash (Cucurbita moschata) 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 Butternut Squash seedlings outdoors around Saturday, May 9, 2026, about 2 weeks after your last frost date.