When to Plant Dahlia in Wellesley Island, New York (13640)

Location

Wellesley Island, New York

ZIP Code

13640

USDA Zone

Last Frost

Saturday, April 25, 2026

📅 Planting Calendar

Start Seeds Indoors Saturday, March 14, 2026

Transplant Outdoors Saturday, May 2, 2026

Pro Tip: Start Dahlia seeds indoors 6 weeks before your last frost date, then transplant outdoors around Saturday, May 2, 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 Wellesley Island?

Get your seeds now so they're ready by Saturday, March 14, 2026.

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Other Plants for Wellesley Island

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Growing Dahlia in Zone 5b

Dahlia (Dahlia pinnata) is a popular garden vegetable. In Wellesley Island, New York, which is in USDA Hardiness Zone 5b, you should start seeds indoors around Saturday, March 14, 2026.

Your average last frost date is Saturday, April 25, 2026. Plan to transplant your Dahlia seedlings outdoors around Saturday, May 2, 2026, about 1 weeks after your last frost date.