Pulaski County Soil Data
Pulaski County, Arkansas
USDA SSURGO / PHZMAvg pH
5.6
Texture
Loam
Drainage
N/A
Organic Matter
1.6%
Hydrologic Group
D
Data Story
About Soil in Pulaski County, Arkansas
Silty soils in the heart of Arkansas
Pulaski County features an average pH of 5.59, which is nearly identical to the state average of 5.56. This acidic profile is much lower than the national median of 6.5, requiring lime for many garden favorites. The soil identity is defined by its position at the transition between the Ouachita Mountains and the Delta.
A silty profile with moderate clay
The soil is comprised of 48.4% silt and 32.6% sand, giving it a smooth, floury feel when dry. With 19.0% clay, this soil has a higher capacity for nutrient storage than sandier neighbors. This balanced silt-heavy mix provides a stable base for both urban development and agriculture.
Excellent water capacity despite low organic matter
The available water capacity is 0.155 in/in, which surpasses the state average of 0.148. However, organic matter is quite low at 1.58%, falling well below the state benchmark of 4.15%. This means the soil holds water well but needs supplemental compost to improve its biological health.
Variable drainage across the metro area
While a dominant drainage class is not specified, the county's high silt content often leads to moderate drainage speeds. In urban areas like Little Rock, compacted soils can behave like hydrologic group D, increasing runoff during storms. Proper landscaping can help manage this water and prevent local erosion.
Gardening in the zone 8a climate
The 8a hardiness zone allows Pulaski County residents to enjoy a long growing season with mild winters. A soil score of 34.0 indicates that while the soil is functional, it benefits greatly from active management. Whether you are planting a backyard garden or landscaping a park, this soil is ready for growth.
Soil Composition
Soil pH
Soil Series
Detailed soil series data not yet available for this county.
Hydrologic Group
Group D — High Runoff
Clay soils with very slow infiltration rates. Highest runoff potential. These soils have a permanent high water table or are shallow over impervious material.
Drainage Class
Drainage class data not available.
Soil Profile
Dominant texture: Loam
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Acidic Soil Detected
Your county's average pH is 5.6. These products help balance soil pH for healthier grass.
Browse Soil AmendmentsFrequently Asked Questions
What type of soil does Pulaski County have?
Pulaski County's soil is classified as Loam. This indicates the relative proportions of sand, silt, and clay — 33% sand, 48% silt, and 19% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Pulaski County's soil acidic or alkaline?
Pulaski County's soil has a pH of 5.6, which is moderately acidic. This range suits many crops and is common across much of the eastern US.
What is the drainage class for Pulaski County?
Drainage class data is not currently available for Pulaski County.
What crops or plants grow well in Pulaski County's soil?
Based on Pulaski County's Loam texture, pH of 5.6, and drainage class, the soil is well suited for vegetables, grains, and most field crops, row crops and vegetable gardens.
What USDA soil order is found in Pulaski County?
The dominant USDA soil order for Pulaski County is not currently available in our dataset.
Soil & Planting Advisory: Pulaski County
Soil Verdict
Pulaski County is in USDA hardiness zone 8a, a warm climate zone. where winter lows can reach 10°F. Mild winters mean soil rarely freezes deeply, allowing year-round microbial activity and faster organic matter breakdown.
Planting Guidance
Warm-season crops, citrus relatives, and heat-loving ornamentals do well. Cool-season vegetables should be planted in fall and winter. Always match plant selections to the specific microclimate of your property — low spots, slopes, and wind exposure can shift effective hardiness by half a zone.
Soil Implications
Warm soils accelerate organic matter breakdown, so compost and mulch need replenishing more frequently than in cooler zones. Sandy soils common in warm zones drain quickly; water-retentive amendments like compost or peat help hold moisture.
Regional Context
Pulaski County closely matches the Arkansas average hardiness conditions.
Planning your lawn? View lawn care data for Pulaski County on LawnByCounty.com →
Other Counties in Arkansas
Soil data sourced from USDA SSURGO via Soil Data Access. Data is informational only and should not be used as a substitute for on-site soil testing. Contact your local NRCS office for site-specific soil information.