Frio County Soil Data
Frio County, Texas
Avg pH
7.3
Texture
Loam
Drainage
N/A
Organic Matter
1.6%
Hydrologic Group
D
Data Story
About Soil in Frio County, Texas
Alkaline Soils of the Brush Country
Frio County reports an average pH of 7.29, making it more alkaline than the 6.5 national median. While specific taxonomic order and texture data are limited, the chemical profile is clearly defined. This alkalinity influences how local plants access soil nutrients.
A Balanced Silt and Clay Mix
The soil is composed of 48.6% sand, 25.9% silt, and 23.5% clay. This balanced ratio of silt and clay helps the soil hold onto moisture better than purely sandy regions. It provides a stable environment for both roots and structures.
Strong Water Retention Potential
The available water capacity is 0.141 in/in, which beats the Texas state average of 0.133 in/in. Organic matter content is 1.64%, sitting almost exactly at the state average of 1.66%. These numbers suggest a solid foundation for productive agriculture.
High Runoff Risks for Developers
Frio County belongs to hydrologic group D, indicating soil with very low infiltration rates and high runoff potential. While specific drainage class data is unavailable, this group often presents challenges for water management. Builders must account for slow-draining conditions in their designs.
Citrus and Melons in Zone 9a
Hardiness Zone 9a offers a warm climate where citrus and melons can truly flourish. The soil's ability to hold water supports these thirsty crops during the hot Texas summers. It is a fantastic environment for anyone looking to start a productive fruit garden.
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
Frequently Asked Questions
What type of soil does Frio County have?
Frio County's soil is classified as Loam. This indicates the relative proportions of sand, silt, and clay — 49% sand, 26% silt, and 24% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Frio County's soil acidic or alkaline?
Frio County's soil has a pH of 7.3, which is near neutral. This range is ideal for most garden plants and field crops.
What is the drainage class for Frio County?
Drainage class data is not currently available for Frio County.
What crops or plants grow well in Frio County's soil?
Based on Frio County's Loam texture, pH of 7.3, and drainage class, the soil is well suited for drought-tolerant crops and native grasses, row crops and vegetable gardens.
What USDA soil order is found in Frio County?
The dominant USDA soil order for Frio County is not currently available in our dataset.
Planning your lawn? View lawn care data for Frio 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.