When should I plant Grønnkål in Zone 1a?

Start Grønnkål seeds indoors around Apr 13. Transplant outdoors after Apr 27. Expect first harvest around Jun 11.

What is the last frost date for Zone 1a?

The average last spring frost date for Zone 1a is May 25. The first fall frost averages Aug 28, giving a 95-day growing season.

Can I grow Grønnkål in Zone 1a?

Yes. Grønnkål needs 60 days to harvest. Zone 1a has a 95-day growing season, which is sufficient.

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🥬 Growing Grønnkål in Zone 1a

Zone 1a has harsh winters and a short growing season. Start Grønnkål early indoors to maximize your harvest window. Siste frost: May 25. Første frost: Aug 28.

Planting Calendar

Indoor

Outdoor

Harvest

Apr 13Aug 28

Season: May 25 – Aug 28 (95 dager)

Sone1a

Siste frostMay 25

Første frostAug 28

Sesong95 dager

Høst60 dager

SolHalvskygge

When to Plant Grønnkål in Zone 1a

Start Seeds Indoors: Apr 13

Start Grønnkål seeds indoors around Apr 13 (6 uker før siste frost). Optimal germination temperature: 65F. Germinates in 5-10 days.

Transplant Outdoors: Apr 27

Transplant Grønnkål seedlings outdoors after Apr 27. Wait until soil temperature reaches 40F. Space plants at 1/m² (30cm avstand). Harden off plants for a week before moving outside.

Harvest: Jun 11

First harvest approximately Jun 11 (~45 dager from transplant). Continue harvesting until first frost (Aug 28). Grønnkål can overwinter in mild climates for continued harvest.

Fall Planting: Jul 3

For a fall harvest, plant Grønnkål around Jul 3 (8 weeks before first frost).

Samdyrking

✅ Salvie ✅ Dill✅ Løk✅ Rødbeter✅ Poteter

❌ Jordbær

Grønnkål 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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