When to Plant Serrano Pepper in Alhambra, California (91803)
Location
Alhambra, California
ZIP Code
91803
USDA Zone
10b
Last Frost
Friday, January 15, 2027
📅 Planting Calendar
Start Seeds Indoors Friday, November 6, 2026
Transplant Outdoors Friday, January 29, 2027
Pro Tip: Start Serrano Pepper seeds indoors 10 weeks before your last frost date for best results.
🌿 Plant Details
Scientific Name Capsicum annuum
Days to Maturity 80 days
☀️ Growing Requirements
☀️
Sun
Full Sun
💧
Water
Regular
Seeds typically germinate in 7-14 days
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Growing Serrano Pepper in Zone 10b
Serrano Pepper (Capsicum annuum) is a popular garden vegetable. In Alhambra, California, which is in USDA Hardiness Zone 10b, you should start seeds indoors around Friday, November 6, 2026.
Your average last frost date is Friday, January 15, 2027. Plan to transplant your Serrano Pepper seedlings outdoors around Friday, January 29, 2027, about 2 weeks after your last frost date.