When should I plant Kool in Zone 1b?

Start Kool seeds indoors around Apr 13. Transplant outdoors after May 4. Expect first harvest around Jul 8.

What is the last frost date for Zone 1b?

The average last spring frost date for Zone 1b is May 25. The first fall frost averages Aug 28, giving a 95-day growing season.

Can I grow Kool in Zone 1b?

Yes. Kool needs 80 days to harvest. Zone 1b has a 95-day growing season, which is sufficient.

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🥬 Kweken van Kool in Zone 1b

Zone 1b has harsh winters and a short growing season. Start Kool early indoors to maximize your harvest window. Laatste vorst: May 25. Eerste vorst: Aug 28.

Planting Calendar

Indoor

Outdoor

Harvest

Apr 13Aug 28

Season: May 25 – Aug 28 (95 dagen)

Zone1b

Laatste vorstMay 25

Eerste vorstAug 28

Seizoen95 dagen

Oogst80 dagen

ZonVolle Zon

When to Plant Kool in Zone 1b

Start Seeds Indoors: Apr 13

Start Kool seeds indoors around Apr 13 (6 weken voor de laatste vorst). Optimal germination temperature: 70F. Germinates in 5-10 days.

Transplant Outdoors: May 4

Transplant Kool seedlings outdoors after May 4. Wait until soil temperature reaches 45F. Space plants at 1/m² (30cm afstand). Harden off plants for a week before moving outside.

Harvest: Jul 8

First harvest approximately Jul 8 (~65 dagen from transplant). Continue harvesting until first frost (Aug 28).

Fall Planting: Jun 5

For a fall harvest, plant Kool around Jun 5 (12 weeks before first frost).

Begeleidende Beplanting

✅ Aardappels✅ Munt ✅ Dille✅ Uien✅ Selderij

❌ Bonen❌ Tomaten❌ Aardbeien

Kool in Andere 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

Plan Je Tuin voor Kool

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

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