When should I plant Kembang Kol in Zone 4b?

Start Kembang Kol seeds indoors around Mar 20. Transplant outdoors after Apr 17. Expect first harvest around Jun 16.

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 Kembang Kol in Zone 4b?

Yes. Kembang Kol needs 75 days to harvest. Zone 4b has a 157-day growing season, which is sufficient.

🥦

🥦 Growing Kembang Kol in Zone 4b

Zone 4b has cold winters and a moderate growing season. Timing is key for Kembang Kol in this zone. Embun beku terakhir: May 1. Embun beku pertama: Oct 5.

Planting Calendar

Indoor

Outdoor

Harvest

Mar 20Oct 5

Season: May 1 – Oct 5 (157 hari)

Zona4b

Embun beku terakhirMay 1

Embun beku pertamaOct 5

Musim157 hari

Panen75 hari

MatahariMatahari Penuh

When to Plant Kembang Kol in Zone 4b

Start Seeds Indoors: Mar 20

Start Kembang Kol seeds indoors around Mar 20 (6 minggu sebelum embun beku terakhir). Optimal germination temperature: 70F. Germinates in 5-10 days.

Transplant Outdoors: Apr 17

Transplant Kembang Kol seedlings outdoors after Apr 17. Wait until soil temperature reaches 50F. Space plants at 1/m² (30cm jarak). Harden off plants for a week before moving outside.

Harvest: Jun 16

First harvest approximately Jun 16 (~60 hari from transplant). Continue harvesting until first frost (Oct 5).

Fall Planting: Jul 13

For a fall harvest, plant Kembang Kol around Jul 13 (12 weeks before first frost).

Tanaman Pendamping

✅ Bayam ✅ Seledri ✅ Thyme✅ Kacang

❌ Tomat❌ Stroberi❌ Kacang Polong

Kembang Kol 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

Plan Your Garden Kembang Kol

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

Start Free Kembang Kol Growing Guide