When to Plant Dahlia in Cut Bank, Montana (59427)

Location

Cut Bank, Montana

ZIP Code

59427

USDA Zone

Last Frost

Friday, May 15, 2026

📅 Planting Calendar

Start Seeds Indoors Friday, April 3, 2026

Transplant Outdoors Friday, May 22, 2026

Pro Tip: Start Dahlia seeds indoors 6 weeks before your last frost date, then transplant outdoors around Friday, May 22, 2026.

🌿 Plant Details

Scientific Name Dahlia pinnata

Days to Maturity 90 days

Mature Height 18-60"

Spread 18"

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Regular (1-2 inches/week)

↔️

Spacing

18" apart

🌱

Planting Depth

4" deep

Seeds typically germinate in 7-14 days

Ready to Plant Dahlia in Cut Bank?

Get your seeds now so they're ready by Friday, April 3, 2026.

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Other Plants for Cut Bank

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Growing Dahlia in Zone 4a

Dahlia (Dahlia pinnata) is a popular garden vegetable. In Cut Bank, Montana, which is in USDA Hardiness Zone 4a, you should start seeds indoors around Friday, April 3, 2026.

Your average last frost date is Friday, May 15, 2026. Plan to transplant your Dahlia seedlings outdoors around Friday, May 22, 2026, about 1 weeks after your last frost date.