Garfield County Soil Data
Garfield County, Oklahoma
USDA SSURGO / PHZMAvg pH
6.4
Texture
Water
Drainage
N/A
Organic Matter
1.7%
Hydrologic Group
D
Data Story
About Soil in Garfield County, Oklahoma
Balanced Soil pH for Versatile Gardening
Garfield County has a near-ideal pH of 6.44, sitting just under the national median of 6.5. This balance is much more neutral than the Oklahoma state average of 6.06, providing a versatile foundation for agriculture.
Silty Mix Offers Excellent Workability
The soil profile contains 30.6% sand, 43.3% silt, and 20.1% clay. This silty mix offers a great balance of moisture retention and ease of work, making it popular for local farming and gardening.
Superior Water Capacity for Healthy Crops
Organic matter is 1.69%, nearly matching the state average. Most importantly, the available water capacity of 0.165 in/in is significantly higher than the state average of 0.144, giving local plants a major hydration advantage.
Potential for Surface Pooling
Classified as Hydrologic Group D, the soil has a high runoff potential and may drain slowly. This indicates that while the soil holds water well for the plants, it may be prone to surface pooling after heavy rains.
Top-Tier Oklahoma Growing in Zone 7a
In Hardiness Zone 7a, gardeners can successfully grow staple crops like corn, wheat, and hearty vegetables. With a strong soil score of 54.3, this county represents some of the best-performing agricultural land in the state.
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 Garfield County have?
Garfield County's soil is classified as Water. This indicates the relative proportions of sand, silt, and clay — 31% sand, 43% silt, and 20% clay. Sandy soils drain quickly but may need more frequent irrigation and fertilization.
Is Garfield County's soil acidic or alkaline?
Garfield County's soil has a pH of 6.4, which is moderately acidic. This range suits many crops and is common across much of the eastern US.
What is the drainage class for Garfield County?
Drainage class data is not currently available for Garfield County.
What crops or plants grow well in Garfield County's soil?
Based on Garfield County's Water texture, pH of 6.4, and drainage class, the soil is well suited for vegetables, grains, and most field crops.
What USDA soil order is found in Garfield County?
The dominant USDA soil order for Garfield County is not currently available in our dataset.
Soil & Planting Advisory: Garfield County
Soil Verdict
Garfield 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
Garfield County closely matches the Oklahoma average hardiness conditions.
Planning your lawn? View lawn care data for Garfield 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.