When to Plant Onion in Kalskag, Alaska (99607)

Location

Kalskag, Alaska

ZIP Code

99607

USDA Zone

Last Frost

Wednesday, May 20, 2026

📅 Planting Calendar

Start Seeds Indoors Wednesday, March 25, 2026

Transplant Outdoors Wednesday, June 3, 2026

Pro Tip: Start Onion seeds indoors 8 weeks before your last frost date, then transplant outdoors around Wednesday, June 3, 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 Kalskag?

Get your seeds now so they're ready by Wednesday, March 25, 2026.

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🤝 Good Companions

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⚠️ Avoid Planting Near

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Growing Onion in Zone 3b

Onion (Allium cepa) is a popular garden vegetable. In Kalskag, Alaska, which is in USDA Hardiness Zone 3b, you should start seeds indoors around Wednesday, March 25, 2026.

Your average last frost date is Wednesday, May 20, 2026. Plan to transplant your Onion seedlings outdoors around Wednesday, June 3, 2026, about 2 weeks after your last frost date.