When to Plant Napa Cabbage in Colp, Illinois (62921)

Location

Colp, Illinois

ZIP Code

62921

USDA Zone

Last Frost

Friday, April 10, 2026

📅 Planting Calendar

Start Seeds Indoors Friday, February 27, 2026

Transplant Outdoors Friday, April 24, 2026

Pro Tip: Start Napa Cabbage seeds indoors 6 weeks before your last frost date, then transplant outdoors around Friday, April 24, 2026.

🌿 Plant Details

Scientific Name Brassica rapa subsp. pekinensis

Days to Maturity 70 days

Mature Height 12-18"

Spread 12"

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Regular (1-2 inches/week)

↔️

Spacing

18" apart

🌱

Planting Depth

0.25" deep

Seeds typically germinate in 4-7 days

Ready to Plant Napa Cabbage in Colp?

Get your seeds now so they're ready by Friday, February 27, 2026.

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🤝 Good Companions

BeetOnionCeleryCucumber

⚠️ Avoid Planting Near

StrawberryTomatoPepper

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Growing Napa Cabbage in Zone 7a

Napa Cabbage (Brassica rapa subsp. pekinensis) is a popular garden vegetable. In Colp, Illinois, which is in USDA Hardiness Zone 7a, you should start seeds indoors around Friday, February 27, 2026.

Your average last frost date is Friday, April 10, 2026. Plan to transplant your Napa Cabbage seedlings outdoors around Friday, April 24, 2026, about 2 weeks after your last frost date.