When to Plant Impatiens in Corwith, Iowa (50430)

Location

Corwith, Iowa

ZIP Code

50430

USDA Zone

Last Frost

Sunday, May 10, 2026

📅 Planting Calendar

Start Seeds Indoors Sunday, March 1, 2026

Transplant Outdoors Sunday, May 24, 2026

Pro Tip: Start Impatiens seeds indoors 10 weeks before your last frost date, then transplant outdoors around Sunday, May 24, 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 Corwith?

Get your seeds now so they're ready by Sunday, March 1, 2026.

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🤝 Good Companions

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Growing Impatiens in Zone 5a

Impatiens (Impatiens walleriana) is a popular garden vegetable. In Corwith, Iowa, which is in USDA Hardiness Zone 5a, you should start seeds indoors around Sunday, March 1, 2026.

Your average last frost date is Sunday, May 10, 2026. Plan to transplant your Impatiens seedlings outdoors around Sunday, May 24, 2026, about 2 weeks after your last frost date.