When to Plant Napa Cabbage in Gann Valley, South Dakota (57341)

Location

Gann Valley, South Dakota

ZIP Code

57341

USDA Zone

Last Frost

Tuesday, May 5, 2026

📅 Planting Calendar

Start Seeds Indoors Tuesday, March 24, 2026

Transplant Outdoors Tuesday, May 19, 2026

Pro Tip: Start Napa Cabbage seeds indoors 6 weeks before your last frost date, then transplant outdoors around Tuesday, May 19, 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 Gann Valley?

Get your seeds now so they're ready by Tuesday, March 24, 2026.

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🤝 Good Companions

BeetOnionCeleryCucumber

⚠️ Avoid Planting Near

StrawberryTomatoPepper

Other Plants for Gann Valley

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Growing Napa Cabbage in Zone 4b

Napa Cabbage (Brassica rapa subsp. pekinensis) is a popular garden vegetable. In Gann Valley, South Dakota, which is in USDA Hardiness Zone 4b, you should start seeds indoors around Tuesday, March 24, 2026.

Your average last frost date is Tuesday, May 5, 2026. Plan to transplant your Napa Cabbage seedlings outdoors around Tuesday, May 19, 2026, about 2 weeks after your last frost date.