Hardin County Soil Data
Hardin County, Texas
USDA SSURGO / PHZMAvg pH
4.6
Texture
Loam
Drainage
N/A
Organic Matter
2.3%
Hydrologic Group
D
Data Story
About Soil in Hardin County, Texas
Highly Acidic Soils of the Big Thicket
Hardin County features very acidic soil with a pH of 4.61, far below the national median of 6.5. This low pH level reflects the humid, forested environment of East Texas.
Silty Mix with Low Clay Content
The composition is 45.6% sand and 39.5% silt, but only 12.8% clay. This creates a silty texture that is easy to dig but may lack the structural strength of heavier clay soils.
Exceptional Organic Matter and Water Storage
Organic matter is a highlight at 2.29%, significantly higher than the 1.66% Texas average. The available water capacity of 0.164 in/in is also much higher than the state average, ensuring plants stay hydrated.
Slow Water Movement and Potential Runoff
Belonging to hydrologic group D, the soil manages water slowly despite its high sand content. This indicates a high runoff potential, which is a critical consideration for local building and gardening projects.
Ideal for Acid-Loving Plants in Zone 9a
Zone 9a's warm climate and acidic soil are perfect for blueberries, azaleas, and camellias. Utilize the high organic matter to start a lush, native woodland garden in your own backyard.
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 4.6. These products help balance soil pH for healthier grass.
Browse Soil AmendmentsFrequently Asked Questions
What type of soil does Hardin County have?
Hardin County's soil is classified as Loam. This indicates the relative proportions of sand, silt, and clay — 46% sand, 39% silt, and 13% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Hardin County's soil acidic or alkaline?
Hardin County's soil has a low pH of 4.6, which is strongly acidic. Acidic soils benefit from lime applications to raise pH and improve nutrient availability.
What is the drainage class for Hardin County?
Drainage class data is not currently available for Hardin County.
What crops or plants grow well in Hardin County's soil?
Based on Hardin County's Loam texture, pH of 4.6, and drainage class, the soil is well suited for acid-loving plants like blueberries and azaleas, row crops and vegetable gardens.
What USDA soil order is found in Hardin County?
The dominant USDA soil order for Hardin County is not currently available in our dataset.
Soil & Planting Advisory: Hardin County
Soil Verdict
Hardin County is in USDA hardiness zone 9a, a warm climate zone. where winter lows can reach 20°F. Warm winters keep soil biology active nearly year-round, accelerating decomposition but increasing pest and disease pressure in topsoil.
Planting Guidance
Tropical and subtropical plants are viable. Year-round gardening is possible, though summer heat may limit some cool-season crops. Frost is rare; tender plants can overwinter with minimal protection. 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
Rapid organic matter turnover means soils can become nutrient-poor quickly; test annually and fertilize based on results. High soil temperatures favor certain soilborne pathogens; practice crop rotation and avoid overwatering.
Regional Context
Hardin County is somewhat warmer than the Texas statewide average.
Planning your lawn? View lawn care data for Hardin County on LawnByCounty.com →
Other Counties in Texas
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.