When should I plant Kålrot in Zone 4b?

Direct sow Kålrot outdoors around Apr 10. Expect first harvest around May 25.

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.

Yes. Kålrot needs 45 days to harvest. Zone 4b has a 157-day growing season, which is sufficient. You can plant up to 5 successions.

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

Outdoor

Harvest

Apr 10Oct 5

Season: May 1 – Oct 5 (157 dager) · Succession: plant every 3 weeks (up to 5x)

Sone4b

Siste frostMay 1

Første frostOct 5

Sesong157 dager

Høst45 dager

SolFull Sol

Direct sow Kålrot seeds outdoors around Apr 10. Wait until soil temperature reaches 40F. Space plants at 9/m² (10cm avstand).

First harvest approximately May 25 (~45 dager from planting). Continue harvesting until first frost (Oct 5).

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

✅ Erter✅ Vikke

❌ Knoppurt❌ Sennepsblad

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

Track Kålrot from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.