When should I plant Blomkål in Zone 3a?

Start Blomkål seeds indoors around Apr 10. Transplant outdoors after May 8. Expect first harvest around Jul 7.

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 Blomkål in Zone 3a?

Yes. Blomkål needs 75 days to harvest. Zone 3a has a 113-day growing season, which is sufficient.

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🥦 Growing Blomkål in Zone 3a

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

Planting Calendar

Indoor

Outdoor

Harvest

Apr 10Sep 12

Season: May 22 – Sep 12 (113 dage)

Zone3a

Sidste frostMay 22

Første frostSep 12

Sæson113 dage

Høst75 dage

SolFuld Sol

When to Plant Blomkål in Zone 3a

Start Seeds Indoors: Apr 10

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

Transplant Outdoors: May 8

Transplant Blomkål seedlings outdoors after May 8. Wait until soil temperature reaches 50F. Space plants at 1/m² (30cm afstand). Harden off plants for a week before moving outside.

Harvest: Jul 7

First harvest approximately Jul 7 (~60 dage from transplant). Continue harvesting until first frost (Sep 12).

Fall Planting: Jun 20

For a fall harvest, plant Blomkål around Jun 20 (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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