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🌿 Growing Rosemary in Zone 6b

Zone 6b has mild winters and a long growing season — good conditions for Rosemary. Last frost: Apr 15. First frost: Oct 22.

Planting Calendar

Indoor

Outdoor

Harvest

Feb 4Oct 22

Season: Apr 15 – Oct 22 (190 days)

Zone6b

Last FrostApr 15

First FrostOct 22

Season Length190 days

Days to Harvest90

SunFull Sun

Frost ToleranceLight

Spacing1/sqft (12" apart)

When to Plant Rosemary in Zone 6b

Start Seeds Indoors: Feb 4

Start Rosemary seeds indoors around Feb 4 (10 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 14–28 days.

Transplant Outdoors: Apr 22

Transplant Rosemary seedlings outdoors after Apr 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: Jul 21

First harvest approximately Jul 21 (~90 days from transplant). Continue harvesting until first frost (Oct 22). 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 6b?

Start Rosemary seeds indoors around Feb 4. Transplant outdoors after Apr 22. Expect first harvest around Jul 21.

What is the last frost date for Zone 6b?

The average last spring frost date for Zone 6b is Apr 15. The first fall frost averages Oct 22, giving a 190-day growing season.

Can I grow Rosemary in Zone 6b?

Yes. Rosemary needs 90 days to harvest. Zone 6b has a 190-day growing season, which is sufficient.

What is the best month to plant Rosemary in Zone 6b?

The best time to start Rosemary in Zone 6b is Feb. Begin seeds indoors around Feb 4, then transplant outdoors after the last frost date of Apr 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 6b, expect your first harvest around Jul 21.

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