When to Plant Radicchio in Minneapolis, Minnesota (55421)

Location

Minneapolis, Minnesota

ZIP Code

55421

USDA Zone

Last Frost

Sunday, May 10, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Sunday, April 12, 2026

Transplant Outdoors

Sunday, April 26, 2026

Based on last frost Sunday, May 10, 2026 · Zone 5a

Pro tip: Start Radicchio seeds indoors 4 weeks before your last frost date, then transplant outdoors around Sunday, April 26, 2026.

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🌿 Plant Details

Scientific Name Cichorium intybus

Days to Maturity 80 days

Mature Height 6-12"

Spread 10"

Type Head

Fruit Size Small-Medium (fist-sized head)

☀️ Growing Requirements

☀️

Sun

Full Sun to Partial Shade

💧

Water

Regular (keep moist)

↔️

Spacing

10" apart

🌱

Planting Depth

0.25" deep

Seeds typically germinate in 5-10 days

Ready to Plant Radicchio in Minneapolis?

Get your seeds now so they're ready by Sunday, April 12, 2026.

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🤝 Good Companions

CarrotRadishLettuce

🤝

Full Companion Planting Guide for Radicchio

See which plants help Radicchio 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 plants to bolt in year 2 and seed heads to dry on the stalk.

Processing

Cut dried stalks, thresh and winnow to separate seeds.

Seed Viability

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

Pro Tip

Radicchio is a chicory — crosses with endive, escarole, and wild chicory. Isolate by 300 feet.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 46 plants of Radicchio. See plant counts, spacing grids, and companion pairings for every bed size →

Frequently Asked Questions

When should I plant Radicchio in Minneapolis, Minnesota? +

In Minneapolis (Zone 5a), start Radicchio seeds indoors around Sunday, April 12, 2026 and transplant outdoors around Sunday, April 26, 2026.

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

The average last spring frost date for Minneapolis, Minnesota (ZIP 55421) is around Sunday, May 10, 2026. This is based on NOAA climate normals for USDA Zone 5a.

How long does Radicchio take to grow? +

Radicchio typically matures in about 80 days from transplanting. In Minneapolis, that means you can expect harvest around Sunday, April 26, 2026 plus 80 days.

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

Radicchio should be started indoors 4 weeks before your last frost date. In Minneapolis, that means starting around Sunday, April 12, 2026.

📚 More Radicchio Planting Guides

🗺️

Radicchio in Minnesota

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 5a Radicchio Guide

All cities in your zone · Avg dates

→

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Growing Radicchio in Zone 5a

Radicchio (Cichorium intybus) is a popular garden vegetable. In Minneapolis, Minnesota, which is in USDA Hardiness Zone 5a, you should start seeds indoors around Sunday, April 12, 2026.

Your average last frost date is Sunday, May 10, 2026. Plan to transplant your Radicchio seedlings outdoors around Sunday, April 26, 2026, about -2 weeks after your last frost date.