When should I plant Grönkål in Zone 4b?

Start Grönkål seeds indoors around Mar 20. Transplant outdoors after Apr 3. Expect first harvest around May 18.

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 Grönkål in Zone 4b?

Yes. Grönkål needs 60 days to harvest. Zone 4b has a 157-day growing season, which is sufficient.

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🥬 Growing Grönkål in Zone 4b

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

Planting Calendar

Indoor

Outdoor

Harvest

Mar 20Oct 5

Season: May 1 – Oct 5 (157 dagar)

Zon4b

Sista frostMay 1

Första frostOct 5

Säsong157 dagar

Skörd60 dagar

SolHalvskugga

When to Plant Grönkål in Zone 4b

Start Seeds Indoors: Mar 20

Start Grönkål seeds indoors around Mar 20 (6 veckor före sista frosten). Optimal germination temperature: 65F. Germinates in 5-10 days.

Transplant Outdoors: Apr 3

Transplant Grönkål seedlings outdoors after Apr 3. Wait until soil temperature reaches 40F. Space plants at 1/m² (30cm avstånd). Harden off plants for a week before moving outside.

Harvest: May 18

First harvest approximately May 18 (~45 dagar from transplant). Continue harvesting until first frost (Oct 5). Grönkål can overwinter in mild climates for continued harvest.

Fall Planting: Aug 10

For a fall harvest, plant Grönkål around Aug 10 (8 weeks before first frost).

Samplantering

✅ Salvia ✅ Dill✅ Lökar✅ Rödbetor✅ Potatisar

❌ Jordgubbar

Grönkål 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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