Lawn Care Guide for Union County
Union County, Arkansas
Data Story
About Lawn Care in Union County, Arkansas
Significant Lawn Challenges in Union County
Union County is one of the most difficult places for lawns, with a very low difficulty score of 23.1. This is far more challenging than the state average of 37.3 and the national median of 50.0. Success in Zone 8b requires an expert focus on heat and soil acidity.
Extreme Summer Heat and High Rain
With 82 extreme heat days, Union County is much hotter than the state average of 64 days. It also receives 52.8 inches of rain annually, which exceeds the ideal range for many turfgrasses. These conditions create high stress for cool-season grasses, making warm-season varieties mandatory.
Managing Highly Acidic, Sandy Soils
The soil is extremely acidic with a pH of 5.10, requiring significant lime treatment to reach the 6.0-7.0 ideal. With 55.4% sand, the soil drains rapidly and may struggle to hold onto essential nutrients. Frequent, light fertilization and watering are necessary to keep grass fed and hydrated.
Conserving Water Amidst Frequent Drought
The county spent 27 weeks in drought over the last year, and over 40% of the area currently faces severe drought. Because sandy soils lose moisture quickly, you must monitor your lawn daily during the hot summer months. Using rain barrels can provide a helpful supplemental water source during these periods.
Heat-Loving Grasses for Union County
Bermudagrass and St. Augustine are the most resilient choices for the intense heat of Zone 8b. You can start your lawn as early as late March, following the typical last frost on March 24th. Given the low difficulty score, don't be afraid to consult a local extension for a custom soil plan.
Lawn Difficulty Score
Recommended Grasses
Bermudagrass
Cynodon dactylon
Climate Snapshot
Annual Precip
52.8"
Growing Degree Days
5,716.75
Base 50F
Last Spring Frost
03/24
First Fall Frost
11/07
Days Above 95F
82
Hardiness Zone
8b
Seeding Calendar — Zone 8B
Seasonal Lawn Care Checklist
Spring
- Apply pre-emergent herbicide when soil reaches 55F
- Begin mowing when grass reaches 3 inches
- Start irrigation if rainfall is below 1 inch/week
- Soil test every 2-3 years — adjust lime or sulfur as needed
Summer
- Raise mowing height to reduce heat stress
- Water deeply 1-2 times per week (1 inch total)
- Avoid fertilizing cool-season grasses in peak heat
- Scout for grubs and treat if >10 per sq ft
Fall
- Overseed warm-season lawns if thinning
- Apply fall fertilizer (highest N application for cool-season)
- Continue mowing until growth stops
- Rake or mulch leaves to prevent smothering
Winter
- Apply pre-emergent for winter weeds
- Service mower and sharpen blades
- Plan spring soil amendments based on fall test
- Overseed with ryegrass for winter color
Watering Deficit Calculator
Monthly Deficit
0.0"
inches of water
Monthly Water
0
gallons
Estimated Monthly Cost
$0.00
at $0.008/gallon average
Estimates based on 53" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Union County
Excess Moisture & Fungal Disease
High annual rainfall (53 inches) increases risk of fungal diseases like brown patch and dollar spot. Ensure good drainage and avoid overwatering.
Acidic Soil
Soil pH of 5.1 is below the ideal range for most grasses (6.0-7.0). Apply agricultural lime to raise pH gradually.
Persistent Drought Conditions
Union County experienced drought conditions for 27 of the past 52 weeks. Prioritize water-efficient grasses and consider reducing lawn area.
Learn more about regional lawn challenges at The Lawn Report.
Want detailed soil composition, drainage classes, and soil series data? View soil details on SoilByCounty.com
Data sourced from USDA SSURGO, NOAA Climate Normals (1991-2020), USDA Plant Hardiness Zone Map, and US Drought Monitor. Lawn difficulty scores and grass recommendations are estimates for informational purposes only.
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