When should I plant Grønnkål in Zone 3a?

Start Grønnkål seeds indoors around Apr 10. Transplant outdoors after Apr 24. Expect first harvest around Jun 8.

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 Grønnkål in Zone 3a?

Yes. Grønnkål needs 60 days to harvest. Zone 3a has a 113-day growing season, which is sufficient.

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🥬 Growing Grønnkål in Zone 3a

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

Planting Calendar

Indoor

Outdoor

Harvest

Apr 10Sep 12

Season: May 22 – Sep 12 (113 dager)

Sone3a

Siste frostMay 22

Første frostSep 12

Sesong113 dager

Høst60 dager

SolHalvskygge

When to Plant Grønnkål in Zone 3a

Start Seeds Indoors: Apr 10

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

Transplant Outdoors: Apr 24

Transplant Grønnkål seedlings outdoors after Apr 24. Wait until soil temperature reaches 40F. Space plants at 1/m² (30cm avstand). Harden off plants for a week before moving outside.

Harvest: Jun 8

First harvest approximately Jun 8 (~45 dager from transplant). Continue harvesting until first frost (Sep 12). Grønnkål can overwinter in mild climates for continued harvest.

Fall Planting: Jul 18

For a fall harvest, plant Grønnkål around Jul 18 (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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