When to Plant Impatiens in Larslan, Montana (59244)

Location

Larslan, Montana

ZIP Code

59244

USDA Zone

Last Frost

Wednesday, May 20, 2026

📅 Planting Calendar

Start Seeds Indoors Wednesday, March 11, 2026

Transplant Outdoors Wednesday, June 3, 2026

Pro Tip: Start Impatiens seeds indoors 10 weeks before your last frost date, then transplant outdoors around Wednesday, June 3, 2026.

🌿 Plant Details

Scientific Name Impatiens walleriana

Days to Maturity 60 days

Mature Height 8-18"

Spread 12"

☀️ Growing Requirements

☀️

Sun

Partial to Full Shade (2-4 hours)

💧

Water

Regular (1-2 inches/week)

↔️

Spacing

8" apart

🌱

Planting Depth

0.125" deep

Seeds typically germinate in 14-21 days

Ready to Plant Impatiens in Larslan?

Get your seeds now so they're ready by Wednesday, March 11, 2026.

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🤝 Good Companions

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Growing Impatiens in Zone 3b

Impatiens (Impatiens walleriana) is a popular garden vegetable. In Larslan, Montana, which is in USDA Hardiness Zone 3b, you should start seeds indoors around Wednesday, March 11, 2026.

Your average last frost date is Wednesday, May 20, 2026. Plan to transplant your Impatiens seedlings outdoors around Wednesday, June 3, 2026, about 2 weeks after your last frost date.