When should I plant Rosmarin in Zone 3b?

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

What is the last frost date for Zone 3b?

The average last spring frost date for Zone 3b is May 15. The first fall frost averages Sep 22, giving a 130-day growing season.

Can I grow Rosmarin in Zone 3b?

Yes. Rosmarin needs 90 days to harvest. Zone 3b has a 130-day growing season, which is sufficient.

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🌿 Growing Rosmarin in Zone 3b

Zone 3b has harsh winters and a short growing season. Start Rosmarin early indoors to maximize your harvest window. Sidste frost: May 15. Første frost: Sep 22.

Planting Calendar

Indoor

Outdoor

Harvest

Mar 6Sep 22

Season: May 15 – Sep 22 (130 dage)

Zone3b

Sidste frostMay 15

Første frostSep 22

Sæson130 dage

Høst90 dage

SolFuld Sol

When to Plant Rosmarin in Zone 3b

Start Seeds Indoors: Mar 6

Start Rosmarin seeds indoors around Mar 6 (10 uger før sidste frost). Optimal germination temperature: 70F. Germinates in 14-28 days.

Transplant Outdoors: May 22

Transplant Rosmarin seedlings outdoors after May 22. Wait until soil temperature reaches 55F. Space plants at 1/m² (30cm afstand). Harden off plants for a week before moving outside.

Harvest: Aug 20

First harvest approximately Aug 20 (~90 dage from transplant). Continue harvesting until first frost (Sep 22). Rosmarin can overwinter in mild climates for continued harvest.

Samdyrkning

✅ Bønner✅ Gulerødder✅ 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

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