When to Plant Onion in Kaktovik, Alaska (99747)

Location

Kaktovik, Alaska

ZIP Code

99747

USDA Zone

Last Frost

Monday, May 25, 2026

📅 Planting Calendar

Start Seeds Indoors Monday, March 30, 2026

Transplant Outdoors Monday, June 8, 2026

Pro Tip: Start Onion seeds indoors 8 weeks before your last frost date, then transplant outdoors around Monday, June 8, 2026.

🌿 Plant Details

Scientific Name Allium cepa

Days to Maturity 100 days

Mature Height 12-18"

Spread 4"

Type Bulb

Fruit Size Medium (2-4 inch bulb)

☀️ Growing Requirements

☀️

Sun

Full Sun (6+ hours)

💧

Water

Moderate

↔️

Spacing

4" apart

🌱

Planting Depth

0.5" deep

Seeds typically germinate in 7-10 days

Ready to Plant Onion in Kaktovik?

Get your seeds now so they're ready by Monday, March 30, 2026.

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🤝 Good Companions

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⚠️ Avoid Planting Near

BeanPeaAsparagus

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Growing Onion in Zone 3a

Onion (Allium cepa) is a popular garden vegetable. In Kaktovik, Alaska, which is in USDA Hardiness Zone 3a, you should start seeds indoors around Monday, March 30, 2026.

Your average last frost date is Monday, May 25, 2026. Plan to transplant your Onion seedlings outdoors around Monday, June 8, 2026, about 2 weeks after your last frost date.