Dubois County Soil Data
Dubois County, Indiana
USDA SSURGO / PHZMAvg pH
5.9
Texture
Silt Loam
Drainage
N/A
Organic Matter
2.1%
Hydrologic Group
N/A
Data Story
About Soil in Dubois County, Indiana
Acidic and Silty Southern Soil
Dubois County soils are notably acidic with a pH of 5.88, falling below the Indiana average of 6.08 and the national 6.5 median. This acidity is typical for the region's landscape but may require lime for certain crops. The county's overall soil score of 62.5 reflects these chemistry challenges.
Extreme Silt for High Retention
The soil is overwhelmingly silty at 65.2%, with nearly equal parts sand (17.2%) and clay (17.6%). This texture creates a flour-like feel and allows for excellent water storage. However, the low sand content can make the soil prone to erosion if not managed with cover crops.
Low Organic Matter But High Water Storage
Organic matter is low at 2.12%, which is less than half the state average of 4.90%. Despite this, the soil holds water exceptionally well with a capacity of 0.207 in/in. Growers must focus on building soil health through composting to compensate for the naturally low organic levels.
Inferred Hydrology in Dubois
While specific drainage classes are not recorded here, the high silt percentage often leads to slower drainage and potential surface crusting. Managing the water cycle is key in this region to prevent the silty surface from washing away. Gardeners should prioritize mulching to protect the soil structure.
Long Seasons in Zone 6b
Located in the warmer hardiness zone 6b, Dubois County offers a slightly longer growing season for southern favorites. Acid-loving plants like blueberries or azaleas will naturally thrive in this pH. With a little organic boost, your garden will flourish in this silty southern terrain.
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
Acidic Soil Detected
Your county's average pH is 5.9. These products help balance soil pH for healthier grass.
Browse Soil AmendmentsFrequently Asked Questions
What type of soil does Dubois County have?
Dubois County's soil is classified as Silt Loam. This indicates the relative proportions of sand, silt, and clay — 17% sand, 65% silt, and 18% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Dubois County's soil acidic or alkaline?
Dubois County's soil has a pH of 5.9, which is moderately acidic. This range suits many crops and is common across much of the eastern US.
What is the drainage class for Dubois County?
Drainage class data is not currently available for Dubois County.
What crops or plants grow well in Dubois County's soil?
Based on Dubois County's Silt Loam texture, pH of 5.9, 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 Dubois County?
The dominant USDA soil order for Dubois County is not currently available in our dataset.
Soil & Planting Advisory: Dubois County
Soil Verdict
Dubois 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
Dubois 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 Dubois 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.