When to Plant Leek in Saint Onge, South Dakota (57779)

Location

Saint Onge, South Dakota

ZIP Code

57779

USDA Zone

Last Frost

Saturday, April 25, 2026

📅 Planting Calendar

Start Seeds Indoors Saturday, February 14, 2026

Transplant Outdoors Saturday, May 9, 2026

Pro Tip: Start Leek seeds indoors 10 weeks before your last frost date, then transplant outdoors around Saturday, May 9, 2026.

🌿 Plant Details

Scientific Name Allium ampeloprasum

Days to Maturity 120 days

☀️ Growing Requirements

☀️

Sun

Full Sun

💧

Water

Regular

Seeds typically germinate in 1-7 days

Ready to Plant Leek in Saint Onge?

Get your seeds now so they're ready by Saturday, February 14, 2026.

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🤝 Good Companions

CeleryAppleCarrot

⚠️ Avoid Planting Near

Swiss Chard

Other Plants for Saint Onge

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Growing Leek in Zone 5b

Leek (Allium ampeloprasum) is a popular garden vegetable. In Saint Onge, South Dakota, which is in USDA Hardiness Zone 5b, you should start seeds indoors around Saturday, February 14, 2026.

Your average last frost date is Saturday, April 25, 2026. Plan to transplant your Leek seedlings outdoors around Saturday, May 9, 2026, about 2 weeks after your last frost date.