When to Plant Dahlia in Great Neck, New York (11021)

Location

Great Neck, New York

ZIP Code

11021

USDA Zone

Last Frost

Sunday, April 5, 2026

📅 Planting Calendar

Start Seeds Indoors Sunday, February 22, 2026

Transplant Outdoors Sunday, April 12, 2026

Pro Tip: Start Dahlia seeds indoors 6 weeks before your last frost date, then transplant outdoors around Sunday, April 12, 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 Great Neck?

Get your seeds now so they're ready by Sunday, February 22, 2026.

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Growing Dahlia in Zone 7b

Dahlia (Dahlia pinnata) is a popular garden vegetable. In Great Neck, New York, which is in USDA Hardiness Zone 7b, you should start seeds indoors around Sunday, February 22, 2026.

Your average last frost date is Sunday, April 5, 2026. Plan to transplant your Dahlia seedlings outdoors around Sunday, April 12, 2026, about 1 weeks after your last frost date.