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When to Plant Radicchio in Ripley County, MO

Radicchio is an Italian chicory with stunning red and white leaves and a pleasantly bitter flavor. It forms tight heads and is used in salads, grilled, or braised.

Ripley County, Missouri is in USDA Zone 6b. The average last spring frost is March 27 and the first fall frost is November 2, giving you a growing season of approximately 220 days.

At an elevation of 1,300 feet, Ripley County receives approximately 38.2 inches of rainfall annually with predominantly silt loam soil. Summer highs average 89ยฐF, providing good warmth for Radicchio during the growing season.

Ripley County, MO (Zone 6b) Long season
220 days
Last Spring Frost March 27
220 growing days
First Fall Frost November 2

Ripley County Soil Profile

Soil Type

Silt Loam

Soil pH

5.7-6.8

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (125 days to spare)
Start indoors: Feb 12 Transplant: Mar 19 🍅 Harvest: May 21 – Jun 25
Recommended (50%) ✓ Fits season (122 days to spare)
Start indoors: Feb 20 Transplant: Mar 27 🍅 Harvest: May 29 – Jul 3
Safe Start (90%) ✓ Fits season (122 days to spare)
Start indoors: Mar 13 Transplant: Apr 17 🍅 Harvest: Jun 19 – Jul 24

Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.7″/week
You supply
0.3″/week
Watering frequency 1-2 times/week
Season total 636 gal / 100 sq ft
Drought risk

Water stress score is 6/10 โ€” consider drought-tolerant varieties and mulching

Radicchio needs ~1,172 GDD — county provides 3,685 GDD Excellent fit

Radicchio Planting Timeline โ€” Ripley County, MO

Radicchio Planting Calendar

Activity When Date Range
Start Indoors February 20 Feb 20 โ€“ Mar 6
Transplant Outdoors March 27 Mar 27 โ€“ Apr 10
Direct Sow March 13 Mar 13 โ€“ Apr 3
Fall Sowing August 24 Aug 24 โ€“ Sep 7
Harvest May 29 May 29 โ€“ Jul 3

Plant 0.5" deep ยท 6" apart ยท Rows 12" apart

Month-by-Month Timeline

MonthActivities
January โ€”
February Start Indoors
March Start Indoors Transplant Outdoors Direct Sow
April Transplant Outdoors Direct Sow
May Harvest
June Harvest
July Harvest
August Fall Sowing
September Fall Sowing
October โ€”
November โ€”
December โ€”

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

60โ€“80 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 6b

Growing Season

220 days

Growing Tips for Ripley County

Start in late summer for fall harvest. The red color develops with cool nights and light frost. Harvest when heads are firm and compact.

Companion Planting

Good Companions

Avoid Planting Near

  • Fennel

Level Up Your Garden

Frequently Asked Questions

When should I plant Radicchio in Ripley County, MO?

Ripley County is in Zone 6b with an average last frost of March 27. Plan your Radicchio planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Ripley County, MO?

Ripley County, Missouri is in USDA Hardiness Zone 6b. The average last spring frost is March 27 and first fall frost is November 2.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Ripley County gardeners in Zone 6b organize planting dates, track what's growing, and never miss a planting window.

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Ripley County, MO. Local conditions may vary. Last updated: April 2026.