When to Plant Rosemary in Zone 11B
USDA Zone
11B
Cities Covered
14
Avg Last Frost
Friday, January 1, 2027
Plant Type
Indoor Start
📅 Planting Calendar for Zone 11B
Start Seeds Indoors Friday, October 23, 2026
Transplant Outdoors Friday, January 15, 2027
Pro Tip: Start Rosemary seeds indoors 10 weeks before your last frost date for best results.
🌿 Plant Details
Scientific Name Salvia rosmarinus
Days to Maturity 120 days
Sun Requirements Full Sun (6+ hours)
Plant Spacing 24" apart
Cities in Zone 11B
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Growing Rosemary in USDA Zone 11B
Rosemary (Salvia rosmarinus) grows well in USDA Hardiness Zone 11B. This zone includes cities like Long Key, Islamorada, Key West and 11 more.
The average last frost date for Zone 11B is around Friday, January 1, 2027. For best results, start your Rosemary seeds indoors around Friday, October 23, 2026, then transplant outdoors around Friday, January 15, 2027.
Expect to harvest your Rosemary approximately 120 days after planting.