When should I plant Rosemary in Zone 2a?

Start Rosemary seeds indoors around Mar 6. Transplant outdoors after May 22. Expect first harvest around Aug 20.

What is the last frost date for Zone 2a?

The average last spring frost date for Zone 2a is May 15. The first fall frost averages Sep 15, giving a 123-day growing season.

Can I grow Rosemary in Zone 2a?

Yes. Rosemary needs 90 days to harvest. Zone 2a has a 123-day growing season, which is sufficient.

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🌿 Growing Rosemary in Zone 2a

Zone 2a has harsh winters and a short growing season. Start Rosemary early indoors to maximize your harvest window. Last frost: May 15. First frost: Sep 15.

Planting Calendar

Indoor

Outdoor

Harvest

Mar 6Sep 15

Season: May 15 – Sep 15 (123 days)

Zone2a

Last FrostMay 15

First FrostSep 15

Season Length123 days

Days to Harvest90

SunFull Sun

Frost ToleranceLight

Spacing1/sqft (12" apart)

When to Plant Rosemary in Zone 2a

Start Seeds Indoors: Mar 6

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

Transplant Outdoors: May 22

Transplant Rosemary seedlings outdoors after May 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: Aug 20

First harvest approximately Aug 20 (~90 days from transplant). Continue harvesting until first frost (Sep 15). 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

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