When to Plant Watermelon Radish in Fairbanks, Alaska (99708)

Location

Fairbanks, Alaska

ZIP Code

99708

USDA Zone

Last Frost

Monday, June 1, 2026

📅 Planting Calendar

Direct Sow Outdoors Monday, May 4, 2026

Pro Tip: Sow Watermelon Radish directly outdoors 4 weeks before your last frost date.

🌿 Plant Details

Scientific Name Raphanus sativus

Days to Maturity 60 days

Mature Height 6-10"

Spread 4"

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Regular (1-2 inches/week)

↔️

Spacing

4" apart

🌱

Planting Depth

0.5" deep

Seeds typically germinate in 3-7 days

Ready to Plant Watermelon Radish in Fairbanks?

Get your seeds now so they're ready by Monday, May 4, 2026.

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🤝 Good Companions

CarrotSpinachLettucePea

⚠️ Avoid Planting Near

Hyssop

Other Plants for Fairbanks

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Growing Watermelon Radish in Zone 2a

Watermelon Radish (Raphanus sativus) is a popular garden vegetable. In Fairbanks, Alaska, which is in USDA Hardiness Zone 2a, you should direct sow seeds around Monday, May 4, 2026.

Your average last frost date is Monday, June 1, 2026. Watermelon Radish grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.