When to Plant Sweet Potato in Biwabik, Minnesota (55708)

Location

Biwabik, Minnesota

ZIP Code

55708

USDA Zone

Last Frost

Wednesday, May 20, 2026

📅 Planting Calendar

Direct Sow Outdoors Wednesday, May 20, 2026

Pro Tip: Sow Sweet Potato directly outdoors around your last frost date when soil starts to warm.

🌿 Plant Details

Scientific Name Ipomoea batatas

Days to Maturity 100 days

Mature Height 12-18"

Spread 36"

Type Vine

Fruit Size Medium-Large (6-12 oz per root)

☀️ Growing Requirements

☀️

Sun

Full Sun (8+ hours)

💧

Water

Moderate (reduce as harvest approaches)

↔️

Spacing

12" apart

🌱

Planting Depth

4" deep

Seeds typically germinate in 14-21 days

Ready to Plant Sweet Potato in Biwabik?

Get your seeds now so they're ready by Wednesday, May 20, 2026.

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🤝 Good Companions

OkraDillThyme

⚠️ Avoid Planting Near

SquashSunflower

Other Plants for Biwabik

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Growing Sweet Potato in Zone 3b

Sweet Potato (Ipomoea batatas) is a popular garden vegetable. In Biwabik, Minnesota, which is in USDA Hardiness Zone 3b, you should direct sow seeds around Wednesday, May 20, 2026.

Your average last frost date is Wednesday, May 20, 2026. Sweet Potato grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.