Oklahoma County Soil Data
Oklahoma County, Oklahoma
USDA SSURGO / PHZMAvg pH
5.8
Texture
Fine sandy loam
Drainage
Well drained
Organic Matter
1.5%
Hydrologic Group
B
Data Story
About Soil in Oklahoma County, Oklahoma
Urban Soils of Oklahoma County
Oklahoma County is dominated by Alfisols with an average pH of 5.82, slightly more acidic than the state average. These soils are characteristic of the Cross Timbers ecoregion and provide a solid base for both urban landscaping and rural agriculture. The soil score of 35.0 reflects a typical central Oklahoma profile.
The Versatility of Fine Sandy Loam
The soil composition is 37.7% sand, 33.4% silt, and 17.0% clay, forming a classic fine sandy loam. This texture is highly prized for its balance of drainage and nutrient holding capacity. It is easy to work for home gardeners and provides a stable foundation for the county's extensive infrastructure.
Healthy Water Capacity for Central OK
Organic matter sits at 1.50%, while the available water capacity is a respectable 0.149 in/in. Both numbers suggest a soil that is capable of supporting healthy lawn and garden growth with standard maintenance. These levels are very representative of the state’s overall soil health and productivity.
Well-Drained Land for City Growth
Classified as well-drained and belonging to hydrologic group B, these soils allow for moderate infiltration of rainwater. This is ideal for urban development as it reduces localized flooding and supports healthy tree root systems. The land generally stays stable and avoids the extreme saturation found in heavier clay regions.
Abundant Gardening in Zone 7b
In the 7b hardiness zone, Oklahoma County gardeners can grow everything from vibrant roses to hearty summer squash. The fine sandy loam texture is particularly good for ornamental landscaping and backyard vegetable plots. Whether in a suburban yard or a community garden, this soil is ready for your next project.
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: Fine sandy loam
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 Oklahoma County have?
Oklahoma County's soil is classified as Fine sandy loam. This indicates the relative proportions of sand, silt, and clay — 38% sand, 33% silt, and 17% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Oklahoma County's soil acidic or alkaline?
Oklahoma 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 Oklahoma County?
Oklahoma 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 Oklahoma County's soil?
Based on Oklahoma County's Fine sandy loam texture, pH of 5.8, and Well drained, the soil is well suited for vegetables, grains, and most field crops, row crops and vegetable gardens, most annual and perennial crops.
What USDA soil order is found in Oklahoma County?
Oklahoma 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: Oklahoma County
Soil Verdict
Oklahoma 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
Oklahoma County closely matches the Oklahoma average hardiness conditions.
Planning your lawn? View lawn care data for Oklahoma 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.