When to Plant Dahlia in Fairbanks, Alaska (99706)

Location

Fairbanks, Alaska

ZIP Code

99706

USDA Zone

Last Frost

Wednesday, May 20, 2026

📅 Planting Calendar

Start Seeds Indoors Wednesday, April 8, 2026

Transplant Outdoors Wednesday, May 27, 2026

Pro Tip: Start Dahlia seeds indoors 6 weeks before your last frost date, then transplant outdoors around Wednesday, May 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 Fairbanks?

Get your seeds now so they're ready by Wednesday, April 8, 2026.

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Growing Dahlia in Zone 3b

Dahlia (Dahlia pinnata) is a popular garden vegetable. In Fairbanks, Alaska, which is in USDA Hardiness Zone 3b, you should start seeds indoors around Wednesday, April 8, 2026.

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