When should I plant Blomkål in Zone 4a?

Start Blomkål seeds indoors around Mar 24. Transplant outdoors after Apr 21. Expect first harvest around Jun 20.

What is the last frost date for Zone 4a?

The average last spring frost date for Zone 4a is May 5. The first fall frost averages Oct 1, giving a 149-day growing season.

Can I grow Blomkål in Zone 4a?

Yes. Blomkål needs 75 days to harvest. Zone 4a has a 149-day growing season, which is sufficient.

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🥦 Growing Blomkål in Zone 4a

Zone 4a has cold winters and a moderate growing season. Timing is key for Blomkål in this zone. Siste frost: May 5. Første frost: Oct 1.

Planting Calendar

Indoor

Outdoor

Harvest

Mar 24Oct 1

Season: May 5 – Oct 1 (149 dager)

Sone4a

Siste frostMay 5

Første frostOct 1

Sesong149 dager

Høst75 dager

SolFull Sol

When to Plant Blomkål in Zone 4a

Start Seeds Indoors: Mar 24

Start Blomkål seeds indoors around Mar 24 (6 uker før siste frost). Optimal germination temperature: 70F. Germinates in 5-10 days.

Transplant Outdoors: Apr 21

Transplant Blomkål seedlings outdoors after Apr 21. Wait until soil temperature reaches 50F. Space plants at 1/m² (30cm avstand). Harden off plants for a week before moving outside.

Harvest: Jun 20

First harvest approximately Jun 20 (~60 dager from transplant). Continue harvesting until first frost (Oct 1).

Fall Planting: Jul 9

For a fall harvest, plant Blomkål around Jul 9 (12 weeks before first frost).

Samdyrking

✅ Spinat ✅ Selleri ✅ Timian✅ Bønner

❌ Tomater❌ Jordbær❌ Erter

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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