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When to Plant Radicchio in Valley County, NE

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.

Valley County, Nebraska is in USDA Zone 4b. The average last spring frost is May 9 and the first fall frost is October 5, giving you a growing season of approximately 149 days.

At an elevation of 982 feet, Valley County receives approximately 21.7 inches of rainfall annually with predominantly loam soil. Summer highs average 82ยฐF, so choose short-season varieties of Radicchio to ensure they mature before fall.

Valley County, NE (Zone 4b) Short season
149 days
Last Spring Frost May 9
149 growing days
First Fall Frost October 5

Valley County Soil Profile

Soil Type

Loam

Soil pH

6.7-7.8

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (55 days to spare)
Start indoors: Mar 17 Transplant: Apr 28 🍅 Harvest: Jun 30 – Aug 4
Recommended (50%) ✓ Fits season (51 days to spare)
Start indoors: Mar 28 Transplant: May 9 🍅 Harvest: Jul 11 – Aug 15
Safe Start (90%) ✓ Fits season (52 days to spare)
Start indoors: Apr 5 Transplant: May 17 🍅 Harvest: Jul 19 – Aug 23

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
0.6″/week
You supply
0.7″/week
Watering frequency 1-2 times/week
Season total 913 gal / 100 sq ft
Radicchio needs ~805 GDD — county provides 1,713 GDD Excellent fit

Radicchio Planting Timeline โ€” Valley County, NE

Radicchio Planting Calendar

Activity When Date Range
Start Indoors March 28 Mar 28 โ€“ Apr 11
Transplant Outdoors May 9 May 9 โ€“ May 23
Direct Sow May 2 May 2 โ€“ May 23
Fall Sowing July 13 Jul 13 โ€“ Jul 27
Harvest July 11 Jul 11 โ€“ Aug 15

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

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March Start Indoors
April Start Indoors
May Transplant Outdoors Direct Sow
June โ€”
July Fall Sowing Harvest
August Harvest
September โ€”
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 4b

Growing Season

149 days

Growing Tips for Valley 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 Valley County, NE?

Valley County is in Zone 4b with an average last frost of May 9. Plan your Radicchio planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Valley County, NE?

Valley County, Nebraska is in USDA Hardiness Zone 4b. The average last spring frost is May 9 and first fall frost is October 5.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Valley County gardeners in Zone 4b 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 Valley County, NE. Local conditions may vary. Last updated: April 2026.