Gibson County Soil Data
Gibson County, Indiana
USDA SSURGO / PHZMAvg pH
6.3
Texture
Silt Loam
Drainage
N/A
Organic Matter
2.6%
Hydrologic Group
N/A
Data Story
About Soil in Gibson County, Indiana
Balanced pH levels in Southwest Indiana
Gibson County maintains an average pH of 6.33, placing it very close to the national median of 6.5. While detailed taxonomic order data is unavailable, the chemical profile suggests a stable environment for diverse plant life. This near-neutrality is more favorable for nutrient uptake than the state average of 6.08.
Silt-dominant soils provide a smooth base
The local soil consists of 58.6% silt, 23.3% sand, and 17.4% clay. This silt-heavy profile creates a floury texture that retains moisture and nutrients effectively. It offers a moderate balance between the drainage of sand and the storage capacity of clay.
Steady water capacity despite lower organic matter
Organic matter sits at 2.61%, which is below the Indiana average of 4.90% but above the national average of 2.0%. The available water capacity of 0.199 in/in almost matches the state average of 0.202. This consistency ensures reliable hydration for crops during dry spells.
Reliable water storage for local agriculture
While specific drainage classes are not recorded here, the silt-heavy composition suggests moderate permeability. The soil score of 71.4 exactly matches the state average, indicating standard Indiana agricultural utility. Local growers benefit from a predictable, though not elite, hydrological environment.
Mild winters favor Zone 6b harvests
Gibson County sits in hardiness zone 6b, allowing for a slightly longer growing season than northern neighbors. Melons, tomatoes, and stone fruits thrive in this silt-rich environment. Use the balanced pH to your advantage by planting a diverse backyard orchard.
Soil Composition
Soil pH
Soil Series
Detailed soil series data not yet available for this county.
Hydrologic Group
Hydrologic group data not available.
Drainage Class
Drainage class data not available.
Soil Profile
Dominant texture: Silt Loam
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 Gibson County have?
Gibson County's soil is classified as Silt Loam. This indicates the relative proportions of sand, silt, and clay — 23% sand, 59% silt, and 17% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Gibson County's soil acidic or alkaline?
Gibson County's soil has a pH of 6.3, which is moderately acidic. This range suits many crops and is common across much of the eastern US.
What is the drainage class for Gibson County?
Drainage class data is not currently available for Gibson County.
What crops or plants grow well in Gibson County's soil?
Based on Gibson County's Silt Loam texture, pH of 6.3, and drainage class, the soil is well suited for vegetables, grains, and most field crops, row crops and vegetable gardens.
What USDA soil order is found in Gibson County?
The dominant USDA soil order for Gibson County is not currently available in our dataset.
Soil & Planting Advisory: Gibson County
Soil Verdict
Gibson County is in USDA hardiness zone 6b, a moderate climate zone. where winter lows can reach -5°F. Freeze-thaw cycles are moderate; soil biology slows in winter but recovers reliably in spring, supporting a broad range of plants.
Planting Guidance
A wide plant palette is possible: deciduous trees, most shrubs, cool-season vegetables, and many perennials thrive here. 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
Moderate freeze-thaw cycles naturally aerate the soil but can also cause compaction in clay-heavy areas; annual core aeration is beneficial. Organic matter amendments decompose at a moderate pace — aim for 3-5% organic content for optimal fertility. When soil temperatures drop below freezing, microbial nitrogen cycling stops; spring fertilization is more effective than late-fall application.
Regional Context
Gibson County closely matches the Indiana average hardiness conditions. The zone range of 6b-7a within the county means soil and planting decisions should account for local elevation and topography.
Planning your lawn? View lawn care data for Gibson County on LawnByCounty.com →
Other Counties in Indiana
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.