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When to Plant Radish in Douglas County, GA

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.

Douglas County, Georgia is in USDA Zone 7b. The average last spring frost is March 31 and the first fall frost is November 1, giving you a growing season of approximately 215 days.

At an elevation of 171 feet, Douglas County receives approximately 60.8 inches of rainfall annually with predominantly clay loam soil. Summer highs average 94ยฐF, providing good warmth for Radish during the growing season. Clay soil retains moisture well for Radish, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Radish root diseases.

Douglas County, GA (Zone 7b) Long season
215 days
Last Spring Frost March 31
215 growing days
First Fall Frost November 1

Douglas County Soil Profile

Soil Type

Clay Loam

Soil pH

5.5-6.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (168 days to spare)
Transplant: Mar 23 🍅 Harvest: Apr 20 – May 11
Recommended (50%) ✓ Fits season (166 days to spare)
Transplant: Mar 31 🍅 Harvest: Apr 28 – May 19
Safe Start (90%) ✓ Fits season (171 days to spare)
Transplant: Apr 17 🍅 Harvest: May 15 – Jun 5

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
1.2″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Radish needs ~584 GDD — county provides 4,407 GDD Excellent fit

Radish Planting Timeline โ€” Douglas County, GA

Radish Planting Calendar

Activity When Date Range
Direct Sow March 17 Mar 17 โ€“ Apr 7
Fall Sowing August 23 Aug 23 โ€“ Sep 6
Harvest April 14 Apr 14 โ€“ May 5

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 7b

Growing Season

215 days

Growing Tips for Douglas 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 Douglas County, GA?

Douglas County is in Zone 7b with an average last frost of March 31. Plan your Radish planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Douglas County, GA?

Douglas County, Georgia is in USDA Hardiness Zone 7b. The average last spring frost is March 31 and first fall frost is November 1.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Douglas County gardeners in Zone 7b 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 Douglas County, GA. Local conditions may vary. Last updated: April 2026.