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When to Plant Radish in Jackson County, MS

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.

Jackson County, Mississippi is in USDA Zone 8b. The average last spring frost is March 2 and the first fall frost is November 26, giving you a growing season of approximately 269 days.

At an elevation of 182 feet, Jackson County receives approximately 57.7 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 91ยฐF, providing good warmth for Radish during the growing season. Sandy soil warms quickly in spring โ€” great for early planting โ€” but Radish will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Radish root diseases.

Jackson County, MS (Zone 8b) Long season
269 days
Last Spring Frost March 2
269 growing days
First Fall Frost November 26

Jackson County Soil Profile

Soil Type

Sandy Loam

Soil pH

5.1-6.1

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (228 days to spare)
Transplant: Feb 14 🍅 Harvest: Mar 14 – Apr 4
Recommended (50%) ✓ Fits season (220 days to spare)
Transplant: Mar 2 🍅 Harvest: Mar 30 – Apr 20
Safe Start (90%) ✓ Fits season (218 days to spare)
Transplant: Mar 25 🍅 Harvest: Apr 22 – May 13

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
0.9″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Radish needs ~520 GDD — county provides 4,909 GDD Excellent fit

Radish Planting Timeline โ€” Jackson County, MS

Radish Planting Calendar

Activity When Date Range
Direct Sow February 16 Feb 16 โ€“ Mar 9
Fall Sowing September 17 Sep 17 โ€“ Oct 1
Harvest March 16 Mar 16 โ€“ Apr 6

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

Month-by-Month Timeline

MonthActivities
January โ€”
February Direct Sow
March Direct Sow Harvest
April Harvest
May โ€”
June โ€”
July โ€”
August โ€”
September Fall Sowing
October Fall Sowing
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 8b

Growing Season

269 days

Growing Tips for Jackson 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 Jackson County, MS?

Jackson County is in Zone 8b with an average last frost of March 2. Plan your Radish planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Jackson County, MS?

Jackson County, Mississippi is in USDA Hardiness Zone 8b. The average last spring frost is March 2 and first fall frost is November 26.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Jackson County gardeners in Zone 8b 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 Jackson County, MS. Local conditions may vary. Last updated: April 2026.