When to Plant Dahlia in Mobile, Alabama (36607)

Location

Mobile, Alabama

ZIP Code

36607

USDA Zone

Last Frost

Friday, February 20, 2026

📅 Planting Calendar

Start Seeds Indoors Friday, January 9, 2026

Transplant Outdoors Friday, February 27, 2026

Pro Tip: Start Dahlia seeds indoors 6 weeks before your last frost date, then transplant outdoors around Friday, February 27, 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 Mobile?

Get your seeds now so they're ready by Friday, January 9, 2026.

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Growing Dahlia in Zone 9a

Dahlia (Dahlia pinnata) is a popular garden vegetable. In Mobile, Alabama, which is in USDA Hardiness Zone 9a, you should start seeds indoors around Friday, January 9, 2026.

Your average last frost date is Friday, February 20, 2026. Plan to transplant your Dahlia seedlings outdoors around Friday, February 27, 2026, about 1 weeks after your last frost date.