Warren County Soil Data
Warren County, Tennessee
Avg pH
5.2
Texture
Loam
Drainage
Moderately well drained
Organic Matter
1.8%
Hydrologic Group
B/D
Data Story
About Soil in Warren County, Tennessee
Warren's Acidic Loam Foundation
Warren County sits on a base of Ultisols characterized by a loamy texture and a pH of 5.20. This acidity is more pronounced than the state average of 5.35 and significantly lower than the national median of 6.5. These weathered soils require careful management to balance pH for most commercial crops.
A Balanced Blend for Workability
The soil contains 30.7% sand, 46.2% silt, and 20.9% clay, creating a versatile loam texture. This balanced mix offers a middle ground between rapid drainage and moisture retention. Gardeners find this soil easier to work than the heavy clay profiles found in neighboring regions.
Lower Fertility and Water Capacity
Organic matter stands at 1.78%, trailing both the Tennessee average of 2.44% and the national 2.0% benchmark. The available water capacity of 0.165 in/in also falls slightly below the state average. This means supplemental irrigation and regular composting are essential for high-yield gardening.
Reliable Mid-Level Drainage
The county's soils are classified as moderately well drained with a dual B/D hydrologic group designation. This indicates moderate infiltration rates when dry, but potential runoff issues during heavy Tennessee rains. Builders and farmers should account for these variable drainage speeds during site planning.
Vibrant Growth in Zone 7b
Hardiness zone 7b supports a wide array of nursery crops, which have historically thrived in Warren County's loam. While the acidic profile favors azaleas and blueberries, most vegetables will need lime to reach their full potential. Start a garden today by focusing on soil-building practices to boost that organic matter.
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
Moderately well drained
Water is removed somewhat slowly. May have a slowly permeable layer or seasonal water table.
Soil Profile
Dominant texture: Loam
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Frequently Asked Questions
What type of soil does Warren County have?
Warren County's soil is classified as Loam. This indicates the relative proportions of sand, silt, and clay — 31% sand, 46% silt, and 21% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Warren County's soil acidic or alkaline?
Warren County's soil has a low pH of 5.2, which is strongly acidic. Acidic soils benefit from lime applications to raise pH and improve nutrient availability.
What is the drainage class for Warren County?
Warren County has a dominant drainage class of "Moderately 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 Warren County's soil?
Based on Warren County's Loam texture, pH of 5.2, and Moderately well drained, the soil is well suited for acid-loving plants like blueberries and azaleas, row crops and vegetable gardens, most annual and perennial crops.
What USDA soil order is found in Warren County?
Warren County's dominant soil order is Ultisols. Ultisols are highly weathered, clay-rich soils common in humid regions. They are low in natural fertility and often require lime and fertilizer for agriculture.
Planning your lawn? View lawn care data for Warren County on LawnByCounty.com →
Other Counties in Tennessee
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.