When should I plant Bloemkool in Zone 4a?

Start Bloemkool seeds indoors around Mar 24. Transplant outdoors after Apr 21. Expect first harvest around Jun 20.

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 Bloemkool in Zone 4a?

Yes. Bloemkool needs 75 days to harvest. Zone 4a has a 149-day growing season, which is sufficient.

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🥦 Kweken van Bloemkool in Zone 4a

Zone 4a has cold winters and a moderate growing season. Timing is key for Bloemkool in this zone. Laatste vorst: May 5. Eerste vorst: Oct 1.

Planting Calendar

Indoor

Outdoor

Harvest

Mar 24Oct 1

Season: May 5 – Oct 1 (149 dagen)

Zone4a

Laatste vorstMay 5

Eerste vorstOct 1

Seizoen149 dagen

Oogst75 dagen

ZonVolle Zon

When to Plant Bloemkool in Zone 4a

Start Seeds Indoors: Mar 24

Start Bloemkool seeds indoors around Mar 24 (6 weken voor de laatste vorst). Optimal germination temperature: 70F. Germinates in 5-10 days.

Transplant Outdoors: Apr 21

Transplant Bloemkool seedlings outdoors after Apr 21. Wait until soil temperature reaches 50F. Space plants at 1/m² (30cm afstand). Harden off plants for a week before moving outside.

Harvest: Jun 20

First harvest approximately Jun 20 (~60 dagen from transplant). Continue harvesting until first frost (Oct 1).

Fall Planting: Jul 9

For a fall harvest, plant Bloemkool around Jul 9 (12 weeks before first frost).

Begeleidende Beplanting

✅ Spinazie ✅ Selderij ✅ Tijm✅ Bonen

❌ Tomaten❌ Aardbeien❌ Erwten

Bloemkool 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 Bloemkool

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

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