When should I plant Kembang Kol in Zone 4a?

Start Kembang Kol 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 Kembang Kol in Zone 4a?

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

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🥦 Growing Kembang Kol in Zone 4a

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

Planting Calendar

Indoor

Outdoor

Harvest

Mar 24Oct 1

Season: May 5 – Oct 1 (149 hari)

Zona4a

Embun beku terakhirMay 5

Embun beku pertamaOct 1

Musim149 hari

Panen75 hari

MatahariMatahari Penuh

When to Plant Kembang Kol in Zone 4a

Start Seeds Indoors: Mar 24

Start Kembang Kol seeds indoors around Mar 24 (6 minggu sebelum embun beku terakhir). Optimal germination temperature: 70F. Germinates in 5-10 days.

Transplant Outdoors: Apr 21

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

Harvest: Jun 20

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

Fall Planting: Jul 9

For a fall harvest, plant Kembang Kol around Jul 9 (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

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