Clarke County Soil Data
Clarke County, Virginia
USDA SSURGO / PHZMAvg pH
5.2
Texture
Loam
Drainage
N/A
Organic Matter
1.8%
Hydrologic Group
N/A
Data Story
About Soil in Clarke County, Virginia
Clarke County's Silty Soil Identity
At a pH of 5.22, Clarke County's soil is nearly identical to the state average but remains significantly more acidic than the national 6.5 median. The soil score of 25.8 reflects a more favorable growing environment than many of its neighbors.
Balanced Texture for Better Retention
A mix of 42.9% silt and 32.7% sand creates a soil that is smoother and better at holding nutrients than sandy coastal regions. The 18.7% clay content adds structure, helping the ground stay productive through varying weather.
Efficient Moisture for Valley Farming
The available water capacity of 0.146 in/in exceeds the Virginia state average of 0.143, indicating excellent drought resistance. However, organic matter remains low at 1.76%, which is below the 2.90% state benchmark.
Understanding Local Hydrology Patterns
Specific drainage classifications are not available, but the high silt concentration suggests moderate permeability. This composition typically supports stable foundations and effective agricultural drainage for valley farms.
Abundant Growth in Zone 7a
The 7a hardiness zone is perfect for cool-weather greens and hardy perennials. With its superior water capacity, Clarke County is an ideal place to establish a reliable home garden or orchard.
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
Acidic Soil Detected
Your county's average pH is 5.2. These products help balance soil pH for healthier grass.
Browse Soil AmendmentsFrequently Asked Questions
What type of soil does Clarke County have?
Clarke County's soil is classified as Loam. This indicates the relative proportions of sand, silt, and clay — 33% sand, 43% silt, and 19% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Clarke County's soil acidic or alkaline?
Clarke 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 Clarke County?
Drainage class data is not currently available for Clarke County.
What crops or plants grow well in Clarke County's soil?
Based on Clarke County's Loam texture, pH of 5.2, 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 Clarke County?
The dominant USDA soil order for Clarke County is not currently available in our dataset.
Soil & Planting Advisory: Clarke County
Soil Verdict
Clarke County is in USDA hardiness zone 7a, a moderate climate zone. where winter lows can reach 0°F. Mild winters mean soil rarely freezes deeply, allowing year-round microbial activity and faster organic matter breakdown.
Planting Guidance
Warm-season crops, citrus relatives, and heat-loving ornamentals do well. Cool-season vegetables should be planted in fall and winter. Winter protection (mulch, burlap wraps) helps push the zone boundary for desired species. Always match plant selections to the specific microclimate of your property — low spots, slopes, and wind exposure can shift effective hardiness by half a zone.
Soil Implications
Warm soils accelerate organic matter breakdown, so compost and mulch need replenishing more frequently than in cooler zones. Sandy soils common in warm zones drain quickly; water-retentive amendments like compost or peat help hold moisture. When soil temperatures drop below freezing, microbial nitrogen cycling stops; spring fertilization is more effective than late-fall application.
Regional Context
Clarke County closely matches the Virginia average hardiness conditions.
Planning your lawn? View lawn care data for Clarke County on LawnByCounty.com →
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.