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When to Plant Watermelon Radish in Gouldsboro, Maine (04607)

Location

Gouldsboro, Maine

ZIP Code

04607

USDA Zone

6a

Last Frost

Monday, April 20, 2026

📅 Planting Calendar

Direct Sow Outdoors Monday, March 23, 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 Gouldsboro?

Get your seeds now so they're ready by Monday, March 23, 2026.

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🤝 Good Companions

CarrotSpinachLettucePea

⚠️ Avoid Planting Near

Hyssop

Other Plants for Gouldsboro

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Growing Watermelon Radish in Zone 6a

Watermelon Radish (Raphanus sativus) is a popular garden vegetable. In Gouldsboro, Maine, which is in USDA Hardiness Zone 6a, you should direct sow seeds around Monday, March 23, 2026.

Your average last frost date is Monday, April 20, 2026. Watermelon Radish grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.