When to Plant Spaghetti Squash in Riverside, California (92513)
Location
Riverside, California
ZIP Code
92513
USDA Zone
10a
Last Frost
Monday, January 25, 2027
📅 Planting Calendar
Start Seeds Indoors Monday, December 28, 2026
Transplant Outdoors Monday, February 8, 2027
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 10a
Spaghetti Squash (Cucurbita pepo) is a popular garden vegetable. In Riverside, California, which is in USDA Hardiness Zone 10a, you should start seeds indoors around Monday, December 28, 2026.
Your average last frost date is Monday, January 25, 2027. Plan to transplant your Spaghetti Squash seedlings outdoors around Monday, February 8, 2027, about 2 weeks after your last frost date.