When should I plant Grönkål in Zone 4a?

Start Grönkål seeds indoors around Mar 24. Transplant outdoors after Apr 7. Expect first harvest around May 22.

What is the last frost date for Zone 4a?

The average last spring frost date for Zone 4a is May 5. The first fall frost averages Oct 1, giving a 149-day growing season.

Can I grow Grönkål in Zone 4a?

Yes. Grönkål needs 60 days to harvest. Zone 4a has a 149-day growing season, which is sufficient.

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🥬 Growing Grönkål in Zone 4a

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

Planting Calendar

Indoor

Outdoor

Harvest

Mar 24Oct 1

Season: May 5 – Oct 1 (149 dagar)

Zon4a

Sista frostMay 5

Första frostOct 1

Säsong149 dagar

Skörd60 dagar

SolHalvskugga

When to Plant Grönkål in Zone 4a

Start Seeds Indoors: Mar 24

Start Grönkål seeds indoors around Mar 24 (6 veckor före sista frosten). Optimal germination temperature: 65F. Germinates in 5-10 days.

Transplant Outdoors: Apr 7

Transplant Grönkål seedlings outdoors after Apr 7. Wait until soil temperature reaches 40F. Space plants at 1/m² (30cm avstånd). Harden off plants for a week before moving outside.

Harvest: May 22

First harvest approximately May 22 (~45 dagar from transplant). Continue harvesting until first frost (Oct 1). Grönkål can overwinter in mild climates for continued harvest.

Fall Planting: Aug 6

For a fall harvest, plant Grönkål around Aug 6 (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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