When should I plant Rosmarin in Zone 3a?

Start Rosmarin seeds indoors around Mar 13. Transplant outdoors after May 29. Expect first harvest around Aug 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 Sep 12, giving a 113-day growing season.

Can I grow Rosmarin in Zone 3a?

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

🌿

🌿 Growing Rosmarin in Zone 3a

Zone 3a has harsh winters and a short growing season. Start Rosmarin early indoors to maximize your harvest window. Siste frost: May 22. Første frost: Sep 12.

Planting Calendar

Indoor

Outdoor

Harvest

Mar 13Sep 12

Season: May 22 – Sep 12 (113 dager)

Sone3a

Siste frostMay 22

Første frostSep 12

Sesong113 dager

Høst90 dager

SolFull Sol

When to Plant Rosmarin in Zone 3a

Start Seeds Indoors: Mar 13

Start Rosmarin seeds indoors around Mar 13 (10 uker før siste frost). Optimal germination temperature: 70F. Germinates in 14-28 days.

Transplant Outdoors: May 29

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

Harvest: Aug 27

First harvest approximately Aug 27 (~90 dager from transplant). Continue harvesting until first frost (Sep 12). Rosmarin can overwinter in mild climates for continued harvest.

Samdyrking

✅ Bønner✅ Gulrøtter✅ Kål

Rosmarin 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 Rosmarin

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

Start Free Rosmarin Growing Guide