When to Plant Leek in Bagley, Minnesota (56621)

Location

Bagley, Minnesota

ZIP Code

56621

USDA Zone

Last Frost

Wednesday, May 20, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Wednesday, March 11, 2026

Transplant Outdoors

Wednesday, June 3, 2026

Based on last frost Wednesday, May 20, 2026 · Zone 3b

Pro tip: Start Leek seeds indoors 10 weeks before your last frost date, then transplant outdoors around Wednesday, June 3, 2026.

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🌿 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 Bagley?

Get your seeds now so they're ready by Wednesday, March 11, 2026.

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🤝 Good Companions

CeleryAppleCarrot

⚠️ Avoid Planting Near

Swiss Chard

🤝

Full Companion Planting Guide for Leek

See which plants help Leek thrive, which to keep away, and raised bed layout tips →

🛠️ Supplies You'll Need

🌱 Seed Starting Trays 🪴 Seed Starting Mix 💡 Grow Lights 🌡️ Heat Mat 🪵 Raised Garden Bed 🌍 Vegetable Garden Soil 🛠️ Hand Trowel Set 🚿 Watering Can

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🌾 Seed Saving Guide

🟡 Moderate

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Biennial — allow flowering in year 2. Harvest seed heads when seeds are black and ripe.

Processing

Cut seed heads into bags when most seeds are black, dry 1 week, thresh gently.

Seed Viability

Up to 2 years when stored cool, dark, and dry.

Pro Tip

Leeks cross-pollinate with onions via insects. Isolate by at least a mile for truly pure seed.

Frequently Asked Questions

When should I plant Leek in Bagley, Minnesota? +

In Bagley (Zone 3b), start Leek seeds indoors around Wednesday, March 11, 2026 and transplant outdoors around Wednesday, June 3, 2026.

What is the last frost date for Bagley, Minnesota? +

The average last spring frost date for Bagley, Minnesota (ZIP 56621) is around Wednesday, May 20, 2026. This is based on NOAA climate normals for USDA Zone 3b.

How long does Leek take to grow? +

Leek typically matures in about 120 days from transplanting. In Bagley, that means you can expect harvest around Wednesday, June 3, 2026 plus 120 days.

Should I start Leek indoors or direct sow in Minnesota? +

Leek should be started indoors 10 weeks before your last frost date. In Bagley, that means starting around Wednesday, March 11, 2026.

📚 More Leek Planting Guides

🗺️

Leek in Minnesota

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 3b Leek Guide

All cities in your zone · Avg dates

→

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Growing Leek in Zone 3b

Leek (Allium ampeloprasum) is a popular garden vegetable. In Bagley, Minnesota, which is in USDA Hardiness Zone 3b, you should start seeds indoors around Wednesday, March 11, 2026.

Your average last frost date is Wednesday, May 20, 2026. Plan to transplant your Leek seedlings outdoors around Wednesday, June 3, 2026, about 2 weeks after your last frost date.