When to Plant Sweet Potato in Frankfort, Illinois (60423)

Location

Frankfort, Illinois

ZIP Code

60423

USDA Zone

Last Frost

Monday, April 20, 2026

📅 Planting Calendar

Direct Sow Outdoors Monday, April 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 Frankfort?

Get your seeds now so they're ready by Monday, April 20, 2026.

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🤝 Good Companions

OkraDillThyme

⚠️ Avoid Planting Near

SquashSunflower

Other Plants for Frankfort

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Growing Sweet Potato in Zone 6a

Sweet Potato (Ipomoea batatas) is a popular garden vegetable. In Frankfort, Illinois, which is in USDA Hardiness Zone 6a, you should direct sow seeds around Monday, April 20, 2026.

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