Washita County Soil Data
Washita County, Oklahoma
USDA SSURGO / PHZMAvg pH
6.7
Texture
Water
Drainage
N/A
Organic Matter
1.0%
Hydrologic Group
D
Data Story
About Soil in Washita County, Oklahoma
Favorable Neutral pH Levels
Washita County boasts a pH of 6.73, which is more alkaline than the Oklahoma average of 6.06 and sits just above the national median. This near-neutrality is highly favorable for the nutrient uptake of most common crops.
Sandy Texture Ensures Excellent Aeration
With 43.7% sand and 34.0% silt, these soils are light and provide excellent aeration for plant roots. The relatively low clay content of 14.9% means the ground is easy to work but may lose moisture quickly.
Boosting Organic Matter for Better Yields
Organic matter is lower than the state average at 0.98%, and water capacity sits slightly below the state norm at 0.139 in/in. Adding compost or organic mulch can help improve these numbers and increase your garden's productivity.
Managing High Runoff Risks
The soil belongs to hydrologic group D, which indicates a high runoff potential when the ground becomes saturated. Despite the sandy texture, local land managers should plan for controlled drainage to prevent erosion during heavy storms.
Resilient Crops for Western Oklahoma
Zone 7b is perfect for heat-loving staples like cotton and wheat that thrive in sandy soil. Consider planting drought-resistant varieties to make the most of the warm climate and neutral pH.
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
Soil Amendment Products
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Browse Soil AmendmentsFrequently Asked Questions
What type of soil does Washita County have?
Washita County's soil is classified as Water. This indicates the relative proportions of sand, silt, and clay — 44% sand, 34% silt, and 15% clay. Sandy soils drain quickly but may need more frequent irrigation and fertilization.
Is Washita County's soil acidic or alkaline?
Washita County's soil has a pH of 6.7, which is near neutral. This range is ideal for most garden plants and field crops.
What is the drainage class for Washita County?
Drainage class data is not currently available for Washita County.
What crops or plants grow well in Washita County's soil?
Based on Washita County's Water texture, pH of 6.7, and drainage class, the soil is well suited for vegetables, grains, and most field crops.
What USDA soil order is found in Washita County?
The dominant USDA soil order for Washita County is not currently available in our dataset.
Soil & Planting Advisory: Washita County
Soil Verdict
Washita 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
Washita County closely matches the Oklahoma average hardiness conditions.
Planning your lawn? View lawn care data for Washita 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.