Blog

When to Plant Radish in Floyd 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.

Floyd County, Kentucky is in USDA Zone 6b. The average last spring frost is April 21 and the first fall frost is October 21, giving you a growing season of approximately 183 days.

At an elevation of 2,218 feet, Floyd County receives approximately 52 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.

Floyd County, KY (Zone 6b) Moderate season
183 days
Last Spring Frost April 21
183 growing days
First Fall Frost October 21

Floyd County Soil Profile

Soil Type

Silt Loam

Soil pH

5.3-7.1

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (137 days to spare)
Transplant: Apr 14 🍅 Harvest: May 12 – Jun 2
Recommended (50%) ✓ Fits season (134 days to spare)
Transplant: Apr 21 🍅 Harvest: May 19 – Jun 9
Safe Start (90%) ✓ Fits season (126 days to spare)
Transplant: May 11 🍅 Harvest: Jun 8 – Jun 29

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.

Soil Compatibility in Floyd County

How your county's soil matches Radish's growing requirements.

Soil pH

Your soil pH (5.3โ€“7.1) overlaps with Radish's range (6.0โ€“7.0), though not a perfect match.

Soil Texture

The silt loam soil in Floyd County is excellent for Radish โ€” good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is moderate (2.7%). Annual compost additions will help Radish.

How to Plant Radish

0.5"
Planting Depth
2"
Between Plants
6"
Between Rows

Fall planting: Sow 10 weeks before your first frost date for a fall harvest.

Succession Planting Radish

10
successive plantings in your 183-day season

Sow every 2.4 weeks. Last sowing by Sep 16 to harvest before frost.

For a dedicated fall crop, sow by Aug 12.

Plant Water Budget

Plant needs
0.5″/week
Rainfall provides
1.2″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Radish needs ~477 GDD — county provides 3,065 GDD Excellent fit

Radish Planting Timeline โ€” Floyd County, KY

Radish Planting Calendar

Activity When Date Range
Direct Sow April 7 Apr 7 โ€“ Apr 28
Fall Sowing August 12 Aug 12 โ€“ Aug 26
Harvest May 5 May 5 โ€“ May 26

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

Month-by-Month Timeline

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

Growing Conditions

โ˜€๏ธ Sun

Full Sun (6-8+ hours)

๐Ÿ’ง Water

0.5"/week ยท Natural rainfall sufficient

๐Ÿ“… Days to Maturity

22โ€“35 days

๐Ÿงช Soil pH

Needs 6โ€“7 ยท Your soil: acceptable

๐Ÿ—บ๏ธ USDA Zone

Zone 6b

๐Ÿ“† Growing Season

183 days in Floyd County

Growing Tips for Radish in Floyd County

Direct sow Radish outdoors after April 21 in Floyd County when soil has warmed and frost danger has passed.

Your generous 183.0-day season in Floyd County allows multiple plantings of Radish. Sow every 11.0 days for continuous harvest.

Common pests for Radish in this region include cabbage worm and flea beetles. Use row covers early in the season and inspect plants weekly.

General growing tips

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 Floyd County, KY?

Floyd County is in Zone 6b with an average last frost of April 21. Plan your Radish planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Floyd County, KY?

Floyd County, Kentucky is in USDA Hardiness Zone 6b. The average last spring frost is April 21 and first fall frost is October 21.

๐ŸŒฑ

Plan Your Garden with Confidence

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

Get Your Free Garden Planner →

Free download. Plan your entire garden season in minutes.

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