When to Plant Snapdragon in Denver, Colorado (80263)

Location

Denver, Colorado

ZIP Code

80263

USDA Zone

Last Frost

Monday, April 20, 2026

📅 Planting Calendar

Start Seeds Indoors Monday, February 23, 2026

Transplant Outdoors Monday, May 4, 2026

Pro Tip: Start Snapdragon seeds indoors 8 weeks before your last frost date, then transplant outdoors around Monday, May 4, 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 Denver?

Get your seeds now so they're ready by Monday, February 23, 2026.

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Growing Snapdragon in Zone 6a

Snapdragon (Antirrhinum majus) is a popular garden vegetable. In Denver, Colorado, which is in USDA Hardiness Zone 6a, you should start seeds indoors around Monday, February 23, 2026.

Your average last frost date is Monday, April 20, 2026. Plan to transplant your Snapdragon seedlings outdoors around Monday, May 4, 2026, about 2 weeks after your last frost date.