When to Plant Radish in Caldwell 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.
Caldwell County, Kentucky is in USDA Zone 6b. The average last spring frost is April 6 and the first fall frost is October 31, giving you a growing season of approximately 208 days.
At an elevation of 1,554 feet, Caldwell County receives approximately 40.7 inches of rainfall annually with predominantly silt loam soil. Summer highs average 90°F, providing good warmth for Radish during the growing season.
Caldwell County Soil Profile
Soil Type
Silt Loam
Soil pH
5.7-6.6
Drainage
Well Drained
Plant Planting Risk Windows
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
Radish Planting Timeline — Caldwell County, KY
Radish Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | March 23 | Mar 23 – Apr 13 |
| Fall Sowing | August 22 | Aug 22 – Sep 5 |
| Harvest | April 20 | Apr 20 – May 11 |
Plant 0.5" deep · 2" apart · Rows 6" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Direct Sow |
| April | Direct Sow Harvest |
| May | Harvest |
| June | — |
| July | — |
| August | Fall Sowing |
| September | Fall Sowing |
| October | — |
| November | — |
| December | — |
Growing Conditions
Sun
Full Sun (6-8+ hours)
Water
Moderate — regular watering
Days to Maturity
22–35 days
Soil pH
6 – 7
USDA Zone
Zone 6b
Growing Season
208 days
Growing Tips for Caldwell 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
Level Up Your Garden
Radish in Other Locations
Frequently Asked Questions
When should I plant Radish in Caldwell County, KY?
Caldwell County is in Zone 6b with an average last frost of April 6. Plan your Radish planting based on this frost date — see the calendar above for exact timing.
What planting zone is Caldwell County, KY?
Caldwell County, Kentucky is in USDA Hardiness Zone 6b. The average last spring frost is April 6 and first fall frost is October 31.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Caldwell County gardeners in Zone 6b organize planting dates, track what's growing, and never miss a planting window.
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