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When to Plant Radish in Muhlenberg County, KY

Radishes are one of the fastest-growing vegetables, with some varieties ready in under a month. They come in round, elongated, and large winter types.

Muhlenberg County, Kentucky is in USDA Zone 6b. The average last spring frost is April 7 and the first fall frost is October 28, giving you a growing season of approximately 204 days.

At an elevation of 3,873 feet, Muhlenberg County receives approximately 54.2 inches of rainfall annually with predominantly silt loam soil. Summer highs average 89ยฐF, providing good warmth for Radish during the growing season. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Radish root diseases.

Muhlenberg County, KY (Zone 6b) Long season
204 days
Last Spring Frost April 7
204 growing days
First Fall Frost October 28

Muhlenberg County Soil Profile

Soil Type

Silt Loam

Soil pH

5.6-6.7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (152 days to spare)
Transplant: Apr 3 🍅 Harvest: May 1 – May 22
Recommended (50%) ✓ Fits season (155 days to spare)
Transplant: Apr 7 🍅 Harvest: May 5 – May 26
Safe Start (90%) ✓ Fits season (155 days to spare)
Transplant: Apr 20 🍅 Harvest: May 18 – Jun 8

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
1.1″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Drought risk

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

Radish needs ~477 GDD — county provides 3,417 GDD Excellent fit

Radish Planting Timeline โ€” Muhlenberg County, KY

Radish Planting Calendar

Activity When Date Range
Direct Sow March 24 Mar 24 โ€“ Apr 14
Fall Sowing August 19 Aug 19 โ€“ Sep 2
Harvest April 21 Apr 21 โ€“ May 12

Plant 0.5" deep ยท 2" apart ยท Rows 6" apart

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March Direct Sow
April Direct Sow Harvest
May Harvest
June โ€”
July โ€”
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

22โ€“35 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 6b

Growing Season

204 days

Growing Tips for Muhlenberg County

Direct sow every 1-2 weeks for continuous harvest. Do not transplant. Harvest spring radishes promptly to prevent them from becoming pithy and hot.

Companion Planting

Good Companions

Avoid Planting Near

  • Hyssop

Level Up Your Garden

Frequently Asked Questions

When should I plant Radish in Muhlenberg County, KY?

Muhlenberg County is in Zone 6b with an average last frost of April 7. Plan your Radish planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Muhlenberg County, KY?

Muhlenberg County, Kentucky is in USDA Hardiness Zone 6b. The average last spring frost is April 7 and first fall frost is October 28.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Muhlenberg 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 Muhlenberg County, KY. Local conditions may vary. Last updated: April 2026.