Roanoke County Soil Data
Roanoke County, Virginia
Avg pH
5.3
Texture
Loam
Drainage
N/A
Organic Matter
2.0%
Hydrologic Group
N/A
Data Story
About Soil in Roanoke County, Virginia
Mountain Valley Soil Profiles
Roanoke County has an average soil pH of 5.27, which is slightly more alkaline than the state average of 5.23. However, it still falls well below the national median of 6.5, indicating naturally acidic mountain soils. No dominant taxonomic order is specified for this diverse topographic region.
Balanced and Workable Mix
The soil contains 43.7% sand, 38.5% silt, and 17.7% clay, creating a medium-textured profile. This balance allows for good root aeration while maintaining enough clay to hold nutrients. It is a versatile mix that avoids the extremes of heavy clay or overly dry sand.
Strong Water Storage Potential
The available water capacity is 0.149 in/in, which is higher than the Virginia state average of 0.143 in/in. While organic matter is 1.97%—just below the national average of 2.0%—the soil's ability to hold water is a major asset. This combination supports healthy pasture and forest growth throughout the county.
Reliable Natural Drainage
While specific drainage classes are not provided, the high silt and sand content suggests moderate to good internal drainage. This texture typically prevents the long-term waterlogging that can damage crop roots. These soils are generally stable, though slopes require careful erosion management.
Abundance in Zone 7b
Roanoke County's 7b hardiness zone is ideal for a wide range of perennial shrubs and fruit trees. The soil's above-average water capacity makes it especially resilient during dry Virginia summers. Consider planting native viburnums or blueberries, which thrive in the local acidic conditions.
Soil Composition
Soil pH
Soil Series
Detailed soil series data not yet available for this county.
Hydrologic Group
Hydrologic group data not available.
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 Roanoke County have?
Roanoke County's soil is classified as Loam. This indicates the relative proportions of sand, silt, and clay — 44% sand, 39% silt, and 18% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Roanoke County's soil acidic or alkaline?
Roanoke County's soil has a low pH of 5.3, which is strongly acidic. Acidic soils benefit from lime applications to raise pH and improve nutrient availability.
What is the drainage class for Roanoke County?
Drainage class data is not currently available for Roanoke County.
What crops or plants grow well in Roanoke County's soil?
Based on Roanoke County's Loam texture, pH of 5.3, 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 Roanoke County?
The dominant USDA soil order for Roanoke County is not currently available in our dataset.
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Other Counties in Virginia
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.