When should I plant Grønnkål in Zone 5b?

Start Grønnkål seeds indoors around Mar 17. Transplant outdoors after Mar 31. Expect first harvest around May 15.

What is the last frost date for Zone 5b?

The average last spring frost date for Zone 5b is Apr 28. The first fall frost averages Oct 8, giving a 163-day growing season.

Can I grow Grønnkål in Zone 5b?

Yes. Grønnkål needs 60 days to harvest. Zone 5b has a 163-day growing season, which is sufficient.

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🥬 Growing Grønnkål in Zone 5b

Zone 5b has cold winters and a moderate growing season. Timing is key for Grønnkål in this zone. Siste frost: Apr 28. Første frost: Oct 8.

Planting Calendar

Indoor

Outdoor

Harvest

Mar 17Oct 8

Season: Apr 28 – Oct 8 (163 dager)

Sone5b

Siste frostApr 28

Første frostOct 8

Sesong163 dager

Høst60 dager

SolHalvskygge

When to Plant Grønnkål in Zone 5b

Start Seeds Indoors: Mar 17

Start Grønnkål seeds indoors around Mar 17 (6 uker før siste frost). Optimal germination temperature: 65F. Germinates in 5-10 days.

Transplant Outdoors: Mar 31

Transplant Grønnkål seedlings outdoors after Mar 31. Wait until soil temperature reaches 40F. Space plants at 1/m² (30cm avstand). Harden off plants for a week before moving outside.

Harvest: May 15

First harvest approximately May 15 (~45 dager from transplant). Continue harvesting until first frost (Oct 8). Grønnkål can overwinter in mild climates for continued harvest.

Fall Planting: Aug 13

For a fall harvest, plant Grønnkål around Aug 13 (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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