When should I plant Rosemary in Zone 3a?

Start Rosemary seeds indoors around Mar 13. Transplant outdoors after May 29. Expect first harvest around Ago 27.

What is the last frost date for Zone 3a?

The average last spring frost date for Zone 3a is May 22. The first fall frost averages Set 12, giving a 113-day growing season.

Can I grow Rosemary in Zone 3a?

Yes. Rosemary needs 90 days to harvest. Zone 3a has a 113-day growing season, which is sufficient.

🌿

🌿 Growing Rosemary in Zone 3a

Zone 3a has harsh winters and a short growing season. Start Rosemary early indoors to maximize your harvest window. Huling frost: May 22. Unang frost: Set 12.

Planting Calendar

Indoor

Outdoor

Harvest

Mar 13Set 12

Season: May 22 – Set 12 (113 araw)

Zone3a

Huling frostMay 22

Unang frostSet 12

Season113 araw

Ani90 araw

ArawBuong Araw

When to Plant Rosemary in Zone 3a

Start Seeds Indoors: Mar 13

Start Rosemary seeds indoors around Mar 13 (10 linggo bago ang huling hamog). Optimal germination temperature: 70F. Germinates in 14-28 days.

Transplant Outdoors: May 29

Transplant Rosemary seedlings outdoors after May 29. Wait until soil temperature reaches 55F. Space plants at 1/m² (30cm pagitan). Harden off plants for a week before moving outside.

Harvest: Ago 27

First harvest approximately Ago 27 (~90 araw from transplant). Continue harvesting until first frost (Set 12). Rosemary can overwinter in mild climates for continued harvest.

Mga Kasamang Halaman

✅ Sitaw✅ Mga Karot✅ Repolyo

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 Garden Rosemary

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

Start Free Rosemary Growing Guide