Coryell County Soil Data
Coryell County, Texas
Avg pH
7.3
Texture
Variable
Drainage
N/A
Organic Matter
2.4%
Hydrologic Group
D
Data Story
About Soil in Coryell County, Texas
The Alkaline Uplands of Coryell County
Coryell County soils maintain an average pH of 7.30, making them more alkaline than both the state average of 7.09 and the national median of 6.5. This variable soil profile is characteristic of the Grand Prairie region's limestone influence. The alkaline chemistry can sometimes limit the availability of certain micronutrients like iron for sensitive plants.
A Diverse and Balanced Texture Mix
The soil is a complex blend featuring 30.3% sand, 34.8% silt, and 30.4% clay. This balanced distribution offers a mix of drainage from the sand and nutrient retention from the clay. Because the texture is highly variable across the county, local gardeners often encounter different digging conditions from one acre to the next.
Rich Organic Matter Exceeds State Norms
Coryell County boasts a high organic matter content of 2.40%, significantly outperforming the Texas average of 1.66% and the national 2.0% benchmark. This biological richness supports healthy microbial life and natural fertility. The available water capacity is 0.131 in/in, aligning closely with the state average of 0.133 in/in.
Managing Slow-Draining Group D Soils
The county's soils fall into hydrologic group D, indicating high runoff potential and limited downward water movement. Without specific drainage class data, the hydrologic group serves as a warning for potential saturation in low-lying areas. Proper site grading is essential for any construction or gardening project in this region.
Gardening in the Zone 8b Heat
Located in hardiness zone 8b, Coryell County offers a warm climate where okra, peppers, and sweet potatoes thrive in the nutrient-rich soil. The high organic matter provides a fantastic head start for organic vegetable gardening. It is a perfect time to plant native perennials that love the local limestone-derived soils.
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: Variable
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Frequently Asked Questions
What type of soil does Coryell County have?
Coryell County's soil is classified as Variable. This indicates the relative proportions of sand, silt, and clay — 30% sand, 35% silt, and 30% clay. Sandy soils drain quickly but may need more frequent irrigation and fertilization.
Is Coryell County's soil acidic or alkaline?
Coryell 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 Coryell County?
Drainage class data is not currently available for Coryell County.
What crops or plants grow well in Coryell County's soil?
Based on Coryell County's Variable texture, pH of 7.3, and drainage class, the soil is well suited for drought-tolerant crops and native grasses.
What USDA soil order is found in Coryell County?
The dominant USDA soil order for Coryell County is not currently available in our dataset.
Planning your lawn? View lawn care data for Coryell 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.