Hamilton County Soil Data
Hamilton County, Texas
Avg pH
7.5
Texture
Clay loam
Drainage
Well drained
Organic Matter
2.2%
Hydrologic Group
B
Data Story
About Soil in Hamilton County, Texas
Alkaline Mollisols Define the Local Landscape
Hamilton County features Mollisols with a pH of 7.45, which is more alkaline than the national median of 6.5. This clay loam soil provides a sturdy, mineral-rich foundation for the region's diverse plant life.
A Versatile Clay Loam Blend
The soil contains 39.0% sand, 32.7% silt, and 27.8% clay. This balanced composition offers excellent workability while the clay content ensures the ground retains essential nutrients for crops.
Organic Matter Exceeds State Averages
At 2.22%, the organic matter content sits comfortably above the Texas average of 1.66% and the national 2.0% benchmark. The available water capacity of 0.135 in/in matches the state trend, offering reliable growing potential.
Well-Drained Soils Support Steady Growth
These soils are well-drained and belong to hydrologic group B. This classification indicates moderate infiltration rates, which helps minimize surface runoff during heavy Central Texas rains.
Thriving Gardens in Zone 8b
Hamilton's 33.7 soil score and 8b hardiness zone are perfect for heat-tolerant crops like okra and peppers. Start your garden today to take advantage of this region's superior fertility.
Soil Composition
Soil pH
Soil Series
Detailed soil series data not yet available for this county.
Hydrologic Group
Group B — Moderate Runoff
Moderately deep, moderately well-drained soils with moderate infiltration rates. Good balance of drainage and water retention.
Drainage Class
Well drained
Water is removed from the soil readily but not rapidly. Optimal for most plants and construction.
Soil Profile
Dominant texture: Clay loam
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Frequently Asked Questions
What type of soil does Hamilton County have?
Hamilton County's soil is classified as Clay loam. This indicates the relative proportions of sand, silt, and clay — 39% sand, 33% silt, and 28% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Hamilton County's soil acidic or alkaline?
Hamilton County's soil has a pH of 7.5, which is near neutral. This range is ideal for most garden plants and field crops.
What is the drainage class for Hamilton County?
Hamilton County has a dominant drainage class of "Well drained." Well-drained soils allow excess water to move through quickly, reducing waterlogging risk and supporting most field and garden crops.
What crops or plants grow well in Hamilton County's soil?
Based on Hamilton County's Clay loam texture, pH of 7.5, and Well drained, the soil is well suited for drought-tolerant crops and native grasses, row crops and vegetable gardens, most annual and perennial crops.
What USDA soil order is found in Hamilton County?
Hamilton County's dominant soil order is Mollisols. Mollisols are fertile, dark-colored soils that formed under grassland vegetation. They are among the most productive agricultural soils in the world.
Planning your lawn? View lawn care data for Hamilton 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.