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🌿 Growing Rosemary in Zone 11b

Zone 11b has a year-round growing season. Rosemary can be planted almost any time with proper planning. Last frost: Jan 15. First frost: Dec 31.

Planting Calendar

Indoor

Outdoor

Harvest

Nov 6Dec 31

Season: Jan 15 – Dec 31 (350 days)

Zone11b

Last FrostJan 15

First FrostDec 31

Season Length350 days

Days to Harvest90

SunFull Sun

Frost ToleranceLight

Spacing1/sqft (12" apart)

When to Plant Rosemary in Zone 11b

Start Seeds Indoors: Nov 6

Start Rosemary seeds indoors around Nov 6 (10 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 14–28 days.

Transplant Outdoors: Jan 22

Transplant Rosemary seedlings outdoors after Jan 22. Wait until soil temperature reaches 55°F. Space plants at 1/sqft (12" apart). Harden off plants for a week before moving outside.

Harvest: Apr 22

First harvest approximately Apr 22 (~90 days from transplant). Continue harvesting until first frost (Dec 31). Rosemary can overwinter in mild climates for continued harvest.

Companion Planting

✅ Beans✅ Carrots✅ Cabbage

Rosemary in Other Zones

1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13b

Frequently Asked Questions

When should I plant Rosemary in Zone 11b?

Start Rosemary seeds indoors around Nov 6. Transplant outdoors after Jan 22. Expect first harvest around Apr 22.

What is the last frost date for Zone 11b?

The average last spring frost date for Zone 11b is Jan 15. The first fall frost averages Dec 31, giving a 350-day growing season.

Can I grow Rosemary in Zone 11b?

Yes. Rosemary needs 90 days to harvest. Zone 11b has a 350-day growing season, which is sufficient.

What is the best month to plant Rosemary in Zone 11b?

The best time to start Rosemary in Zone 11b is Nov. Begin seeds indoors around Nov 6, then transplant outdoors after the last frost date of Jan 15.

What companion plants grow well with Rosemary?

Good companion plants for Rosemary include Beans, Carrots, Cabbage.

How long does Rosemary take to harvest?

Rosemary takes approximately 90 days from planting to harvest. In Zone 11b, expect your first harvest around Apr 22.

Plan Your Rosemary Garden

Track Rosemary from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.

Start Free Rosemary Growing Guide