When to Plant Cabbage in Fort Harrison, Montana (59636)

Location

Fort Harrison, Montana

ZIP Code

59636

USDA Zone

Last Frost

Tuesday, May 5, 2026

📅 Planting Calendar

Start Seeds Indoors Tuesday, March 24, 2026

Transplant Outdoors Tuesday, May 5, 2026

Pro Tip: Start Cabbage seeds indoors 6 weeks before your last frost date, then transplant outdoors around Tuesday, May 5, 2026.

🌿 Plant Details

Scientific Name Brassica oleracea var. capitata

Days to Maturity 70 days

Mature Height 12-18"

Spread 24"

Type Head

Fruit Size Large (2-5 lb head)

☀️ Growing Requirements

☀️

Sun

Full Sun to Partial Shade

💧

Water

Regular (1-1.5 inches/week)

↔️

Spacing

18" apart

🌱

Planting Depth

0.5" deep

Seeds typically germinate in 4-10 days

Ready to Plant Cabbage in Fort Harrison?

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

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🤝 Good Companions

CeleryDillOnionPotatoChamomile

⚠️ Avoid Planting Near

StrawberryTomatoGrape

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Growing Cabbage in Zone 4b

Cabbage (Brassica oleracea var. capitata) is a popular garden vegetable. In Fort Harrison, Montana, 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 Cabbage seedlings outdoors around Tuesday, May 5, 2026, about 0 weeks after your last frost date.