When to Plant Radicchio in Honolulu, Hawaii (96821)
Location
Honolulu, Hawaii
ZIP Code
96821
USDA Zone
12b
Last Frost
Friday, January 1, 2027
📅 Planting Calendar
Start Seeds Indoors Friday, December 4, 2026
Transplant Outdoors Friday, December 18, 2026
Pro Tip: Start Radicchio seeds indoors 4 weeks before your last frost date for best results.
🌿 Plant Details
Scientific Name Cichorium intybus
Days to Maturity 80 days
☀️ Growing Requirements
☀️
Sun
Full Sun
💧
Water
Regular
Seeds typically germinate in 7-14 days
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Growing Radicchio in Zone 12b
Radicchio (Cichorium intybus) is a popular garden vegetable. In Honolulu, Hawaii, which is in USDA Hardiness Zone 12b, you should start seeds indoors around Friday, December 4, 2026.
Your average last frost date is Friday, January 1, 2027. Plan to transplant your Radicchio seedlings outdoors around Friday, December 18, 2026, about -2 weeks after your last frost date.