Walworth County Soil Data
Walworth County, Wisconsin
USDA SSURGO / PHZMAvg pH
6.1
Texture
Silt loam
Drainage
Well drained
Organic Matter
4.5%
Hydrologic Group
C
Data Story
About Soil in Walworth County, Wisconsin
The Nutrient-Rich Alfisols of Walworth
Walworth County is dominated by Alfisols with a silt loam texture and an average pH of 6.13. This pH is slightly more acidic than the national median of 6.5 but remains significantly higher than the Wisconsin state average of 5.63. These soils are characteristic of the region's productive agricultural history.
A Balanced Silt Loam Mix
The soil composition features 46.4% silt, 30.3% sand, and 16.4% clay. This silty blend offers excellent workability and enough clay to hold onto vital nutrients without becoming overly heavy. It represents a versatile foundation for both large-scale farming and home gardening.
Solid Water Capacity and Organic Matter
With an organic matter content of 4.51%, Walworth easily beats the national average of 2.0%, though it sits below the state average of 11.02%. Its available water capacity of 0.203 in/in is nearly identical to the state benchmark of 0.204 in/in. This means the soil reliably holds moisture for crops during dry spells.
Well-Drained Land for Stable Building
The dominant soils are classified as well-drained and belong to hydrologic group C. This drainage profile is ideal for most crops because it prevents root rot while maintaining sufficient moisture. For builders, this indicates a soil that manages rain effectively without excessive ponding.
Bountiful Growth in Zone 5b
Walworth County sits in USDA hardiness zone 5b, making it a prime spot for corn, soybeans, and hardy vegetables. The silt loam texture provides an inviting environment for deep-rooted perennials and orchard fruits. You should feel confident starting a diverse vegetable garden in this high-scoring soil.
Soil Composition
Soil pH
Soil Series
Detailed soil series data not yet available for this county.
Hydrologic Group
Group C — Moderate-High Runoff
Soils with slow infiltration rates, often with a layer that impedes downward water movement. Higher clay content restricts drainage.
Drainage Class
Well drained
Water is removed from the soil readily but not rapidly. Optimal for most plants and construction.
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 Walworth County have?
Walworth County's soil is classified as Silt loam. This indicates the relative proportions of sand, silt, and clay — 30% sand, 46% silt, and 16% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Walworth County's soil acidic or alkaline?
Walworth County's soil has a pH of 6.1, which is moderately acidic. This range suits many crops and is common across much of the eastern US.
What is the drainage class for Walworth County?
Walworth County has a dominant drainage class of "Well drained." Well-drained soils allow excess water to move through quickly, reducing waterlogging risk and supporting most field and garden crops.
What crops or plants grow well in Walworth County's soil?
Based on Walworth County's Silt loam texture, pH of 6.1, and Well drained, the soil is well suited for vegetables, grains, and most field crops, row crops and vegetable gardens, most annual and perennial crops.
What USDA soil order is found in Walworth County?
Walworth County's dominant soil order is Alfisols. Alfisols are moderate to high base-status soils with a clay-enriched subsoil. They support productive forests and cropland across temperate regions.
Soil & Planting Advisory: Walworth County
Soil Verdict
Walworth County is in USDA hardiness zone 5b, a cold climate zone. where winter lows can reach -15°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
Walworth County closely matches the Wisconsin average hardiness conditions.
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Other Counties in Wisconsin
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.