When should I plant Blomkål in Zone 3b?

Start Blomkål seeds indoors around Apr 3. Transplant outdoors after May 1. Expect first harvest around Jun 30.

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 Blomkål in Zone 3b?

Yes. Blomkål needs 75 days to harvest. Zone 3b has a 130-day growing season, which is sufficient.

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🥦 Growing Blomkål in Zone 3b

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

Planting Calendar

Indoor

Outdoor

Harvest

Apr 3Sep 22

Season: May 15 – Sep 22 (130 dage)

Zone3b

Sidste frostMay 15

Første frostSep 22

Sæson130 dage

Høst75 dage

SolFuld Sol

When to Plant Blomkål in Zone 3b

Start Seeds Indoors: Apr 3

Start Blomkål seeds indoors around Apr 3 (6 uger før sidste frost). Optimal germination temperature: 70F. Germinates in 5-10 days.

Transplant Outdoors: May 1

Transplant Blomkål seedlings outdoors after May 1. Wait until soil temperature reaches 50F. Space plants at 1/m² (30cm afstand). Harden off plants for a week before moving outside.

Harvest: Jun 30

First harvest approximately Jun 30 (~60 dage from transplant). Continue harvesting until first frost (Sep 22).

Fall Planting: Jun 30

For a fall harvest, plant Blomkål around Jun 30 (12 weeks before first frost).

Samdyrkning

✅ Spinat ✅ Selleri ✅ Timian✅ Bønner

❌ Tomater❌ Jordbær❌ Ærter

Blomkål 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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