Stephens County Soil Data
Stephens County, Oklahoma
USDA SSURGO / PHZMAvg pH
5.8
Texture
Water
Drainage
N/A
Organic Matter
1.6%
Hydrologic Group
D
Data Story
About Soil in Stephens County, Oklahoma
Stephens County's Mildly Acidic Identity
The soil pH in Stephens County averages 5.83, which is closer to the state average of 6.06 than many eastern counties. However, it remains more acidic than the national median of 6.5. This pH level is generally manageable for most regional agricultural practices with minimal intervention.
A Balanced Mix of Sand and Silt
The soil is comprised of 44.7% sand, 27.6% silt, and 16.8% clay. This texture provides a stable medium that allows for decent aeration while retaining some moisture. It is a versatile mix that supports both grazing lands and residential landscaping.
Meeting the State Average for Water
The available water capacity is 0.144 in/in, matching the Oklahoma state average exactly. Organic matter levels reach 1.57%, which is just below the state norm of 1.72%. With a soil score of 34.7, the county is nearly on par with the statewide productivity average of 35.3.
Infiltration Challenges in Group D
Stephens County soil falls into Hydrologic Group D, suggesting limited water infiltration and high runoff. This classification is common in the region and implies that the soil may stay saturated for long periods after rain. Farmers should monitor for erosion, especially on sloped terrains.
Warmth and Growth in Zone 8a
As part of Hardiness Zone 8a, Stephens County enjoys a very long growing season and mild winters. This climate is ideal for okra, cotton, and various fruit trees that require a long heat window. The soil's balanced water capacity makes it an excellent candidate for a productive backyard garden.
Soil Composition
Soil pH
Soil Series
Detailed soil series data not yet available for this county.
Hydrologic Group
Group D — High Runoff
Clay soils with very slow infiltration rates. Highest runoff potential. These soils have a permanent high water table or are shallow over impervious material.
Drainage Class
Drainage class data not available.
Soil Profile
Dominant texture: Water
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Acidic Soil Detected
Your county's average pH is 5.8. These products help balance soil pH for healthier grass.
Browse Soil AmendmentsFrequently Asked Questions
What type of soil does Stephens County have?
Stephens County's soil is classified as Water. This indicates the relative proportions of sand, silt, and clay — 45% sand, 28% silt, and 17% clay. Sandy soils drain quickly but may need more frequent irrigation and fertilization.
Is Stephens County's soil acidic or alkaline?
Stephens County's soil has a pH of 5.8, which is moderately acidic. This range suits many crops and is common across much of the eastern US.
What is the drainage class for Stephens County?
Drainage class data is not currently available for Stephens County.
What crops or plants grow well in Stephens County's soil?
Based on Stephens County's Water texture, pH of 5.8, and drainage class, the soil is well suited for vegetables, grains, and most field crops.
What USDA soil order is found in Stephens County?
The dominant USDA soil order for Stephens County is not currently available in our dataset.
Soil & Planting Advisory: Stephens County
Soil Verdict
Stephens County is in USDA hardiness zone 8a, a warm climate zone. where winter lows can reach 10°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
Stephens County is somewhat warmer than the Oklahoma statewide average. The zone range of 7b-8a within the county means soil and planting decisions should account for local elevation and topography.
Planning your lawn? View lawn care data for Stephens County on LawnByCounty.com →
Other Counties in Oklahoma
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.