McIntosh County Soil Data
McIntosh County, Oklahoma
USDA SSURGO / PHZMAvg pH
5.6
Texture
Water
Drainage
N/A
Organic Matter
1.5%
Hydrologic Group
D
Data Story
About Soil in McIntosh County, Oklahoma
Acidic Foundations in McIntosh County
McIntosh County features soil with an average pH of 5.63, which is significantly more acidic than the national median of 6.5. This low pH level reflects the unique environmental history of the region. While technical taxonomic data is sparse, the chemistry indicates a need for careful lime management for most crops.
A Gritty Mix with Coarse Texture
The soil composition leans heavily toward sand at 43.0%, balanced by 32.3% silt and 17.3% clay. This high sand content provides decent aeration but requires frequent monitoring of moisture levels. The moderate clay percentage helps maintain enough structure to prevent total nutrient leaching.
Water Storage Beats the State Average
The county's organic matter sits at 1.48%, trailing the Oklahoma average of 1.72%. However, its available water capacity of 0.150 in/in exceeds the state benchmark of 0.144 in/in. This suggests that despite lower organic fertility, the soil is surprisingly good at holding onto hydration for plants.
High Runoff Risks for Landowners
Classified in hydrologic group D, these soils have a high runoff potential when thoroughly wet. This group typically indicates restricted water movement through the soil profile, which can lead to pooling during heavy Oklahoma storms. Builders and farmers should plan for robust drainage systems to manage excess surface water.
Gardening in McIntosh’s 7b Hardiness Zone
With a 7b hardiness rating, this area is perfect for heat-tolerant favorites like okra, southern peas, and sweet potatoes. The acidic soil profile also makes it an ideal spot for blueberries or azaleas if you provide a little supplemental care. Start your garden today to take advantage of the county's long, warm growing season.
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 5.6. These products help balance soil pH for healthier grass.
Browse Soil AmendmentsFrequently Asked Questions
What type of soil does McIntosh County have?
McIntosh County's soil is classified as Water. This indicates the relative proportions of sand, silt, and clay — 43% sand, 32% silt, and 17% clay. Sandy soils drain quickly but may need more frequent irrigation and fertilization.
Is McIntosh County's soil acidic or alkaline?
McIntosh County's soil has a pH of 5.6, which is moderately acidic. This range suits many crops and is common across much of the eastern US.
What is the drainage class for McIntosh County?
Drainage class data is not currently available for McIntosh County.
What crops or plants grow well in McIntosh County's soil?
Based on McIntosh County's Water texture, pH of 5.6, and drainage class, the soil is well suited for vegetables, grains, and most field crops.
What USDA soil order is found in McIntosh County?
The dominant USDA soil order for McIntosh County is not currently available in our dataset.
Soil & Planting Advisory: McIntosh County
Soil Verdict
McIntosh 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
McIntosh County closely matches the Oklahoma average hardiness conditions.
Planning your lawn? View lawn care data for McIntosh 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.