Humphreys County Soil Data
Humphreys County, Tennessee
USDA SSURGO / PHZMAvg pH
5.2
Texture
Cherty silt loam
Drainage
Well drained
Organic Matter
2.1%
Hydrologic Group
B
Data Story
About Soil in Humphreys County, Tennessee
Acidic soils of the Western Highland Rim
Humphreys County records a soil pH of 5.25, placing it slightly below the Tennessee state average of 5.35. This acidic profile is common for the region, though it sits a full point below the national median of 6.5.
Balanced silt and sand mix
The soil contains 54.7% silt, 22.1% sand, and 19.9% clay, creating a medium-textured profile. This blend allows for decent drainage while the silt component ensures the ground doesn't dry out too quickly.
Solid organic matter and water storage
Organic matter stands at 2.08%, which exceeds the national average of 2.0% but trails the state's 2.44% mark. The available water capacity of 0.173 in/in is slightly higher than the state average, indicating good drought resilience.
Local hydrology and landscape
While specific drainage classes are unclassified in the primary data, the soil composition suggests steady water movement. The mix of sand and silt typically prevents the severe waterlogging seen in heavier clay counties.
Success in Zone 7b
In Zone 7b, Humphreys County gardeners can thrive with tomatoes, peppers, and various fruit trees. Focus on adding organic mulch to maintain the soil's natural water-holding strengths.
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: Cherty silt 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 Humphreys County have?
Humphreys County's soil is classified as Cherty silt loam. This indicates the relative proportions of sand, silt, and clay — 22% sand, 55% silt, and 20% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Humphreys County's soil acidic or alkaline?
Humphreys 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 Humphreys County?
Humphreys 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 Humphreys County's soil?
Based on Humphreys County's Cherty silt loam texture, pH of 5.2, and 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 Humphreys County?
Humphreys County's dominant soil order is Alfisols. Alfisols are moderate to high base-status soils with a clay-enriched subsoil. They support productive forests and cropland across temperate regions.
Soil & Planting Advisory: Humphreys County
Soil Verdict
Humphreys County is in USDA hardiness zone 7b, a moderate climate zone. where winter lows can reach 5°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. 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.
Regional Context
Humphreys County closely matches the Tennessee average hardiness conditions.
Planning your lawn? View lawn care data for Humphreys 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.