When to Plant Butternut Squash in Isabella, Minnesota (55607)
Location
Isabella, Minnesota
ZIP Code
55607
USDA Zone
3b
Last Frost
Wednesday, May 20, 2026
📅 Planting Calendar
Start Seeds Indoors Wednesday, April 22, 2026
Transplant Outdoors Wednesday, June 3, 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 3b
Butternut Squash (Cucurbita moschata) is a popular garden vegetable. In Isabella, Minnesota, which is in USDA Hardiness Zone 3b, you should start seeds indoors around Wednesday, April 22, 2026.
Your average last frost date is Wednesday, May 20, 2026. Plan to transplant your Butternut Squash seedlings outdoors around Wednesday, June 3, 2026, about 2 weeks after your last frost date.