When should I plant Blomkål in Zone 4b?

Start Blomkål seeds indoors around Mar 20. Transplant outdoors after Apr 17. Expect first harvest around Jun 16.

What is the last frost date for Zone 4b?

The average last spring frost date for Zone 4b is May 1. The first fall frost averages Oct 5, giving a 157-day growing season.

Can I grow Blomkål in Zone 4b?

Yes. Blomkål needs 75 days to harvest. Zone 4b has a 157-day growing season, which is sufficient.

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🥦 Growing Blomkål in Zone 4b

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

Planting Calendar

Indoor

Outdoor

Harvest

Mar 20Oct 5

Season: May 1 – Oct 5 (157 dager)

Sone4b

Siste frostMay 1

Første frostOct 5

Sesong157 dager

Høst75 dager

SolFull Sol

When to Plant Blomkål in Zone 4b

Start Seeds Indoors: Mar 20

Start Blomkål seeds indoors around Mar 20 (6 uker før siste frost). Optimal germination temperature: 70F. Germinates in 5-10 days.

Transplant Outdoors: Apr 17

Transplant Blomkål seedlings outdoors after Apr 17. Wait until soil temperature reaches 50F. Space plants at 1/m² (30cm avstand). Harden off plants for a week before moving outside.

Harvest: Jun 16

First harvest approximately Jun 16 (~60 dager from transplant). Continue harvesting until first frost (Oct 5).

Fall Planting: Jul 13

For a fall harvest, plant Blomkål around Jul 13 (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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