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🌿 Growing Rosemary in Zone 8b

Zone 8b has warm winters and an extended growing season — excellent for heat-loving crops like Rosemary. Last frost: Mar 22. First frost: Nov 10.

Planting Calendar

Indoor

Outdoor

Harvest

Jan 11Nov 10

Season: Mar 22 – Nov 10 (233 days)

Zone8b

Last FrostMar 22

First FrostNov 10

Season Length233 days

Days to Harvest90

SunFull Sun

Frost ToleranceLight

Spacing1/sqft (12" apart)

When to Plant Rosemary in Zone 8b

Start Seeds Indoors: Jan 11

Start Rosemary seeds indoors around Jan 11 (10 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 14–28 days.

Transplant Outdoors: Mar 29

Transplant Rosemary seedlings outdoors after Mar 29. Wait until soil temperature reaches 55°F. Space plants at 1/sqft (12" apart). Harden off plants for a week before moving outside.

Harvest: Jun 27

First harvest approximately Jun 27 (~90 days from transplant). Continue harvesting until first frost (Nov 10). 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 8b?

Start Rosemary seeds indoors around Jan 11. Transplant outdoors after Mar 29. Expect first harvest around Jun 27.

What is the last frost date for Zone 8b?

The average last spring frost date for Zone 8b is Mar 22. The first fall frost averages Nov 10, giving a 233-day growing season.

Can I grow Rosemary in Zone 8b?

Yes. Rosemary needs 90 days to harvest. Zone 8b has a 233-day growing season, which is sufficient.

What is the best month to plant Rosemary in Zone 8b?

The best time to start Rosemary in Zone 8b is Jan. Begin seeds indoors around Jan 11, then transplant outdoors after the last frost date of Mar 22.

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 8b, expect your first harvest around Jun 27.

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