When to Plant Acorn Squash in Yellowstone National Park, Wyoming (82190)
Location
Yellowstone National Park, Wyoming
ZIP Code
82190
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 Acorn Squash seeds indoors 4 weeks before your last frost date for best results.
🌿 Plant Details
Scientific Name Cucurbita pepo
Days to Maturity 85 days
☀️ Growing Requirements
☀️
Sun
Full Sun
💧
Water
Regular
Seeds typically germinate in 7-14 days
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Growing Acorn Squash in Zone 4b
Acorn Squash (Cucurbita pepo) is a popular garden vegetable. In Yellowstone National Park, Wyoming, 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 Acorn Squash seedlings outdoors around Tuesday, May 19, 2026, about 2 weeks after your last frost date.