When to Plant Spaghetti Squash in Hill City, South Dakota (57745)
Location
Hill City, South Dakota
ZIP Code
57745
USDA Zone
4b
Last Frost
Tuesday, May 5, 2026
📅 Planting Calendar
Start Seeds Indoors Tuesday, April 7, 2026
Transplant Outdoors Tuesday, May 19, 2026
Pro Tip: Start Spaghetti Squash seeds indoors 4 weeks before your last frost date for best results.
🌿 Plant Details
Scientific Name Cucurbita pepo
Days to Maturity 90 days
☀️ Growing Requirements
☀️
Sun
Full Sun
💧
Water
Regular
Seeds typically germinate in 7-14 days
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Growing Spaghetti Squash in Zone 4b
Spaghetti Squash (Cucurbita pepo) is a popular garden vegetable. In Hill City, South Dakota, which is in USDA Hardiness Zone 4b, you should start seeds indoors around Tuesday, April 7, 2026.
Your average last frost date is Tuesday, May 5, 2026. Plan to transplant your Spaghetti Squash seedlings outdoors around Tuesday, May 19, 2026, about 2 weeks after your last frost date.