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When to Plant Radish in St. Francis County, AR

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.

St. Francis County, Arkansas is in USDA Zone 7b. The average last spring frost is March 20 and the first fall frost is November 9, giving you a growing season of approximately 234 days.

At an elevation of 1,429 feet, St. Francis County receives approximately 51.2 inches of rainfall annually with predominantly silt loam soil. Summer highs average 88ยฐF, providing good warmth for Radish during the growing season. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Radish root diseases.

St. Francis County, AR (Zone 7b) Long season
234 days
Last Spring Frost March 20
234 growing days
First Fall Frost November 9

St. Francis County Soil Profile

Soil Type

Silt Loam

Soil pH

5.5-6.7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (185 days to spare)
Transplant: Mar 12 🍅 Harvest: Apr 9 – Apr 30
Recommended (50%) ✓ Fits season (185 days to spare)
Transplant: Mar 20 🍅 Harvest: Apr 17 – May 8
Safe Start (90%) ✓ Fits season (184 days to spare)
Transplant: Apr 9 🍅 Harvest: May 7 – May 28

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
You supply
0.1″/week
Watering frequency Only during dry spells
Season total 169 gal / 100 sq ft
Radish needs ~456 GDD — county provides 3,744 GDD Excellent fit

Radish Planting Timeline โ€” St. Francis County, AR

Radish Planting Calendar

Activity When Date Range
Direct Sow March 6 Mar 6 โ€“ Mar 27
Fall Sowing August 31 Aug 31 โ€“ Sep 14
Harvest April 3 Apr 3 โ€“ Apr 24

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

Month-by-Month Timeline

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

234 days

Growing Tips for St. Francis 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 St. Francis County, AR?

St. Francis County is in Zone 7b with an average last frost of March 20. Plan your Radish planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is St. Francis County, AR?

St. Francis County, Arkansas is in USDA Hardiness Zone 7b. The average last spring frost is March 20 and first fall frost is November 9.

๐ŸŒฑ

Plan Your Garden with Confidence

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