When to Plant Radicchio in Agate, North Dakota (58310)

Location

Agate, North Dakota

ZIP Code

58310

USDA Zone

Last Frost

Wednesday, May 20, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Wednesday, April 22, 2026

Transplant Outdoors

Wednesday, May 6, 2026

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

Pro tip: Start Radicchio seeds indoors 4 weeks before your last frost date, then transplant outdoors around Wednesday, May 6, 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 Agate?

Get your seeds now so they're ready by Wednesday, April 22, 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 Agate, North Dakota? +

In Agate (Zone 3b), start Radicchio seeds indoors around Wednesday, April 22, 2026 and transplant outdoors around Wednesday, May 6, 2026.

What is the last frost date for Agate, North Dakota? +

The average last spring frost date for Agate, North Dakota (ZIP 58310) is around Wednesday, May 20, 2026. This is based on NOAA climate normals for USDA Zone 3b.

How long does Radicchio take to grow? +

Radicchio typically matures in about 80 days from transplanting. In Agate, that means you can expect harvest around Wednesday, May 6, 2026 plus 80 days.

Should I start Radicchio indoors or direct sow in North Dakota? +

Radicchio should be started indoors 4 weeks before your last frost date. In Agate, that means starting around Wednesday, April 22, 2026.

📚 More Radicchio Planting Guides

🗺️

Radicchio in North Dakota

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 3b Radicchio Guide

All cities in your zone · Avg dates

→

Other Plants for Agate

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Growing Radicchio in Zone 3b

Radicchio (Cichorium intybus) is a popular garden vegetable. In Agate, North Dakota, which is in USDA Hardiness Zone 3b, you should start seeds indoors around Wednesday, April 22, 2026.

Your average last frost date is Wednesday, May 20, 2026. Plan to transplant your Radicchio seedlings outdoors around Wednesday, May 6, 2026, about -2 weeks after your last frost date.