When to Plant Radicchio in Charleston, Tennessee (37310)

Location

Charleston, Tennessee

ZIP Code

37310

USDA Zone

Last Frost

Sunday, April 5, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Sunday, March 8, 2026

Transplant Outdoors

Sunday, March 22, 2026

Based on last frost Sunday, April 5, 2026 · Zone 7b

Pro tip: Start Radicchio seeds indoors 4 weeks before your last frost date, then transplant outdoors around Sunday, March 22, 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 Charleston?

Get your seeds now so they're ready by Sunday, March 8, 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 Charleston, Tennessee? +

In Charleston (Zone 7b), start Radicchio seeds indoors around Sunday, March 8, 2026 and transplant outdoors around Sunday, March 22, 2026.

What is the last frost date for Charleston, Tennessee? +

The average last spring frost date for Charleston, Tennessee (ZIP 37310) is around Sunday, April 5, 2026. This is based on NOAA climate normals for USDA Zone 7b.

How long does Radicchio take to grow? +

Radicchio typically matures in about 80 days from transplanting. In Charleston, that means you can expect harvest around Sunday, March 22, 2026 plus 80 days.

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

Radicchio should be started indoors 4 weeks before your last frost date. In Charleston, that means starting around Sunday, March 8, 2026.

📚 More Radicchio Planting Guides

🗺️

Radicchio in Tennessee

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 7b Radicchio Guide

All cities in your zone · Avg dates

→

Other Plants for Charleston

Blackberry Blueberry Raspberry Strawberry Basil Chamomile Chives Cilantro Dill Lavender Lemon Balm Marjoram Mint Oregano Parsley Rosemary Sage Tarragon Thyme Acorn Squash Artichoke Arugula Asparagus Beefsteak Tomato Beet Bell Pepper Bok Choy Broccoli Brussels Sprout Butternut Squash Cabbage Cantaloupe Carrot Cauliflower Cayenne Pepper Celery Cherry Tomato Chili Pepper Collard Green Common Bean Cucumber Eggplant Endive Fennel Garlic Grape Tomato Green Bean Habanero Pepper Head Lettuce Heirloom Tomato Honeydew Melon Jalapeño Pepper Kale Kohlrabi Leaf Lettuce Leek Lima Bean Mustard Okra Onion Parsnip Pea Poblano Pepper Pole Pea Potato Pumpkin Radish Rhubarb Roma Tomato Rutabaga Serrano Pepper Shallot Snap Pea Snow Pea Spaghetti Squash Spinach Squash Sweet Corn Sweet Potato Swiss Chard Tomato Turnip Watermelon Zucchini Sunflower Marigold Zinnia Nasturtium Cosmos Echinacea (Coneflower) Petunia Black-eyed Susan Apple Tree Pear Tree Peach Tree Plum Tree Sweet Cherry Tree Lemon Tree Borage Lemongrass Ginger Stevia Tomatillo Edamame Fava Bean Mâche Mizuna Sorrel Shishito Pepper Banana Pepper Watermelon Radish Napa Cabbage Popcorn Broccoli Raab Catnip Valerian Lemon Verbena Bee Balm Anise Lovage Chervil Summer Savory Dahlia Snapdragon Pansy Sweet Pea Morning Glory Hollyhock Larkspur Bachelor Button Columbine Impatiens Salvia (Annual) Sweet Alyssum Celosia Lupine Verbena Elderberry Grape Vine Red Currant Gooseberry Serviceberry Fig Tree Avocado Tree Persimmon Tree Olive Tree

Growing Radicchio in Zone 7b

Radicchio (Cichorium intybus) is a popular garden vegetable. In Charleston, Tennessee, which is in USDA Hardiness Zone 7b, you should start seeds indoors around Sunday, March 8, 2026.

Your average last frost date is Sunday, April 5, 2026. Plan to transplant your Radicchio seedlings outdoors around Sunday, March 22, 2026, about -2 weeks after your last frost date.