When to Plant Snapdragon in Colesburg, Iowa (52035)

Location

Colesburg, Iowa

ZIP Code

52035

USDA Zone

Last Frost

Sunday, May 10, 2026

📅 Planting Calendar

Start Seeds Indoors Sunday, March 15, 2026

Transplant Outdoors Sunday, May 24, 2026

Pro Tip: Start Snapdragon seeds indoors 8 weeks before your last frost date, then transplant outdoors around Sunday, May 24, 2026.

🌿 Plant Details

Scientific Name Antirrhinum majus

Days to Maturity 60 days

Mature Height 12-36"

Spread 12"

☀️ Growing Requirements

☀️

Sun

Full Sun to Partial Shade

💧

Water

Regular (1-2 inches/week)

↔️

Spacing

12" apart

🌱

Planting Depth

0.125" deep

Seeds typically germinate in 10-21 days

Ready to Plant Snapdragon in Colesburg?

Get your seeds now so they're ready by Sunday, March 15, 2026.

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Growing Snapdragon in Zone 5a

Snapdragon (Antirrhinum majus) is a popular garden vegetable. In Colesburg, Iowa, which is in USDA Hardiness Zone 5a, you should start seeds indoors around Sunday, March 15, 2026.

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