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When to Plant Rosemary in Zone 11B

USDA Zone

11B

Cities Covered

14

Avg Last Frost

Thursday, January 1, 2026

Plant Type

Indoor Start

📅 Planting Calendar for Zone 11B

Start Seeds Indoors Thursday, October 23, 2025
Transplant Outdoors Thursday, January 15, 2026

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 Thursday, January 1, 2026. For best results, start your Rosemary seeds indoors around Thursday, October 23, 2025, then transplant outdoors around Thursday, January 15, 2026.

Expect to harvest your Rosemary approximately 120 days after planting.