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When to Plant Watermelon in Woodruff County, AR

Woodruff County, Arkansas Zone 8a May

Top priorities for Woodruff County, Arkansas gardeners in May

A quick May briefing for Woodruff County, Arkansas gardeners — what's urgent, what's next, and what can wait.

Avg. last frost March 20
Avg. first frost November 6
Soil temp (4") 68°F
Watering Low
Pest pressure Moderate
Daylight 13.8 hrs
Get ahead of June
  • First harvests: watermelon

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Watermelon is a sprawling vine crop that produces sweet, juicy fruits in hot weather. Varieties range from personal-sized icebox types to 50-pound giants.

Woodruff County, Arkansas is in USDA Zone 8a. The average last spring frost is March 20 and the first fall frost is November 6, giving you a growing season of approximately 231 days.

At an elevation of 1,343 feet, Woodruff County receives approximately 49.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 89°F, providing good warmth for Watermelon during the growing season.

Woodruff County, AR (Zone 8a) Long season
231 days
Last Spring Frost March 20
231 growing days
First Fall Frost November 6

Woodruff County Soil Profile

Soil Type

Silt Loam

Soil pH

5.7-6.7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (100 days to spare)
Start indoors: Feb 12 Transplant: Mar 26 🍅 Harvest: Jun 4 – Jul 23
Recommended (50%) ✓ Fits season (98 days to spare)
Start indoors: Feb 20 Transplant: Apr 3 🍅 Harvest: Jun 12 – Jul 31
Safe Start (90%) ✓ Fits season (99 days to spare)
Start indoors: Mar 11 Transplant: Apr 22 🍅 Harvest: Jul 1 – Aug 19

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.

Soil Compatibility in Woodruff County

How your county's soil matches Watermelon's growing requirements.

Soil pH

Your soil pH (5.7–6.7) overlaps with Watermelon's range (6.0–7.5), though not a perfect match.

Soil Texture

The silt loam soil in Woodruff County is excellent for Watermelon — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is moderate (2.6%). Annual compost additions will help Watermelon.

How to Plant Watermelon

1"
Planting Depth
30"
Between Plants
42"
Between Rows

Succession Planting Watermelon

3
successive plantings in your 231-day season

Sow every 8 weeks. Last sowing by Jul 29 to harvest before frost.

Plant Water Budget

Plant needs
1.5″/week
Rainfall provides
0.9″/week
You supply
0.6″/week
Watering frequency 1-2 times/week
Season total 1,234 gal / 100 sq ft

Monthly Watering Guide for Watermelon

Watermelon needs approximately 1.5 inches of water per week (6.5" per month). Here's how your county's rainfall compares month by month.

Month Watermelon Needs Rainfall You Supplement Action
Jan 4.4" 0" ❄️ Dormant
Feb 4.1" 0" ❄️ Dormant
Mar 6.5" 4.9" 1.6" 💧 Light watering
Apr 6.5" 3.4" 3.1" 💧 Light watering
May 6.5" 4" 2.5" 💧 Light watering
Jun 6.5" 4.3" 2.2" 💧 Light watering
Jul 6.5" 5.6" 0.9" 💧 Light watering
Aug 6.5" 4.6" 1.9" 💧 Light watering
Sep 6.5" 3.4" 3.1" 💧 Light watering
Oct 6.5" 3.1" 3.4" 🚿 Regular watering
Nov 6.5" 3.3" 3.2" 💧 Light watering
Dec 4.2" 0" ❄️ Dormant

Water needs are for active growing months only (Mar–Nov in Woodruff County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.

Watermelon Heat Requirements (GDD)

What are Growing Degree Days (GDD)?

Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.

Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.

Watermelon needs ~1,424 GDD — county provides 3,869 GDD Excellent fit

Watermelon Planting Timeline — Woodruff County, AR

Watermelon Planting Calendar

Activity When Date Range
Start Indoors February 20 Feb 20 – Mar 6
Transplant Outdoors April 3 Apr 3 – Apr 17
Direct Sow March 27 Mar 27 – Apr 17
Harvest June 12 Jun 12 – Jul 31

Plant 1" deep · 30" apart · Rows 42" apart

Month-by-Month Timeline

MonthActivities
January
February Start Indoors
March Start Indoors Direct Sow
April Transplant Outdoors Direct Sow
May
June Harvest
July Harvest
August
September
October
November
December

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1.5"/week · 1-2 times/week

📅 Days to Maturity

70–100 days

🧪 Soil pH

Needs 6–7.5 · Your soil: acceptable

🗺️ USDA Zone

Zone 8a

📆 Growing Season

231 days in Woodruff County

Growing Tips for Watermelon in Woodruff County

Direct sow Watermelon outdoors after March 20 in Woodruff County when soil has warmed and frost danger has passed.

Common pests for Watermelon in this region include squash vine borer and cucumber beetles. Use row covers early in the season and inspect plants weekly.

General growing tips

Start seeds indoors 3-4 weeks early or direct sow after soil is warm. Plant on mounds with plenty of space. Check ripeness by looking for a yellow ground spot and dull thump when tapped.

Recommended Watermelon Varieties for Woodruff County

Full-size melons that thrive with your long season

Crimson Sweet (85d) Charleston Gray (85d) Moon and Stars (95d)

Companion Planting

Good Companions

Avoid Planting Near

  • Potatoes

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Watermelon in Woodruff County, AR?

Woodruff County is in Zone 8a with an average last frost of March 20. Plan your Watermelon planting based on this frost date — see the calendar above for exact timing.

What planting zone is Woodruff County, AR?

Woodruff County, Arkansas is in USDA Hardiness Zone 8a. The average last spring frost is March 20 and first fall frost is November 6.

🌱

Your Woodruff County Garden Planner — Free

A 24-page printable planner built for Woodruff County (Zone 8a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

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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 Woodruff County, AR. Local conditions may vary. Last updated: May 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.