When to Plant Asparagus in Callaway, Minnesota (56521)

Location

Callaway, Minnesota

ZIP Code

56521

USDA Zone

Last Frost

Friday, May 15, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Friday, March 20, 2026

Transplant Outdoors

Friday, May 29, 2026

Based on last frost Friday, May 15, 2026 · Zone 4a

Pro tip: Start Asparagus seeds indoors 8 weeks before your last frost date, then transplant outdoors around Friday, May 29, 2026.

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🌿 Plant Details

Scientific Name Asparagus officinalis

Days to Maturity 730 days

☀️ Growing Requirements

☀️

Sun

Full Sun

💧

Water

Regular

Seeds typically germinate in 8-21 days

Ready to Plant Asparagus in Callaway?

Get your seeds now so they're ready by Friday, March 20, 2026.

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🤝 Good Companions

TomatoAsterDillCorianderParsleyBasilComfreyMarigold

⚠️ Avoid Planting Near

OnionGarlicPotato

🤝

Full Companion Planting Guide for Asparagus

See which plants help Asparagus 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

Allow red berries to ripen fully on female plants in late summer/fall.

Processing

Mash berries to release seeds, rinse, dry flat for 2 weeks.

Seed Viability

Up to 3 years when stored cool, dark, and dry.

Pro Tip

Asparagus is dioecious — only female plants produce berries. Male plants produce more spears, so save seed selectively.

Frequently Asked Questions

When should I plant Asparagus in Callaway, Minnesota? +

In Callaway (Zone 4a), start Asparagus seeds indoors around Friday, March 20, 2026 and transplant outdoors around Friday, May 29, 2026.

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

The average last spring frost date for Callaway, Minnesota (ZIP 56521) is around Friday, May 15, 2026. This is based on NOAA climate normals for USDA Zone 4a.

How long does Asparagus take to grow? +

Asparagus typically matures in about 730 days from transplanting. In Callaway, that means you can expect harvest around Friday, May 29, 2026 plus 730 days.

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

Asparagus should be started indoors 8 weeks before your last frost date. In Callaway, that means starting around Friday, March 20, 2026.

📚 More Asparagus Planting Guides

🗺️

Asparagus in Minnesota

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 4a Asparagus Guide

All cities in your zone · Avg dates

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Other Plants for Callaway

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Growing Asparagus in Zone 4a

Asparagus (Asparagus officinalis) is a popular garden vegetable. In Callaway, Minnesota, which is in USDA Hardiness Zone 4a, you should start seeds indoors around Friday, March 20, 2026.

Your average last frost date is Friday, May 15, 2026. Plan to transplant your Asparagus seedlings outdoors around Friday, May 29, 2026, about 2 weeks after your last frost date.