Blog

When to Plant Radish in Phillips 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.

Phillips County, Arkansas is in USDA Zone 7b. The average last spring frost is March 14 and the first fall frost is November 12, giving you a growing season of approximately 243 days.

At an elevation of 678 feet, Phillips County receives approximately 50 inches of rainfall annually with predominantly silt loam soil. Summer highs average 93ยฐF, providing good warmth for Radish during the growing season.

Phillips County, AR (Zone 7b) Long season
243 days
Last Spring Frost March 14
243 growing days
First Fall Frost November 12

Phillips County Soil Profile

Soil Type

Silt Loam

Soil pH

5.6-6.7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (190 days to spare)
Transplant: Mar 9 🍅 Harvest: Apr 6 – Apr 27
Recommended (50%) ✓ Fits season (194 days to spare)
Transplant: Mar 14 🍅 Harvest: Apr 11 – May 2
Safe Start (90%) ✓ Fits season (187 days to spare)
Transplant: Apr 7 🍅 Harvest: May 5 – May 26

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
0.2″/week
Watering frequency Only during dry spells
Season total 352 gal / 100 sq ft
Drought risk

Water stress score is 6/10 โ€” consider drought-tolerant varieties and mulching

Radish needs ~563 GDD — county provides 4,799 GDD Excellent fit

Radish Planting Timeline โ€” Phillips County, AR

Radish Planting Calendar

Activity When Date Range
Direct Sow February 28 Feb 28 โ€“ Mar 21
Fall Sowing September 3 Sep 3 โ€“ Sep 17
Harvest March 28 Mar 28 โ€“ Apr 18

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 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

243 days

Growing Tips for Phillips 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 Phillips County, AR?

Phillips County is in Zone 7b with an average last frost of March 14. Plan your Radish planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Phillips County, AR?

Phillips County, Arkansas is in USDA Hardiness Zone 7b. The average last spring frost is March 14 and first fall frost is November 12.

๐ŸŒฑ

Plan Your Garden with Confidence

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