Winnebago County Soil Data
Winnebago County, Wisconsin
USDA SSURGO / PHZMAvg pH
5.9
Texture
Silt loam
Drainage
Well drained
Organic Matter
7.1%
Hydrologic Group
C
Data Story
About Soil in Winnebago County, Wisconsin
The Reliable Alfisols of Winnebago
Winnebago County is dominated by Alfisols with a silt loam texture and an average pH of 5.92. This pH is slightly higher than the state average of 5.63, though it remains below the national median of 6.5. These soils are historically productive and form the backbone of local agriculture.
A Perfectly Balanced Texture
The soil features a very even split of 37.8% sand and 37.6% silt, with 16.1% clay. This silt loam texture is widely considered the gold standard for versatility and ease of farming. It offers enough clay for nutrient storage while remaining loose enough for easy root penetration.
Strong Organic Foundation
With 7.09% organic matter, Winnebago's soil is much richer than the national average of 2.0%. The available water capacity is 0.197 in/in, which is very close to the state average of 0.204 in/in. These metrics indicate a soil that can sustain healthy plant growth through varied weather.
Well-Drained Ground for Healthy Roots
The soil is classified as well-drained and belongs to hydrologic group C. This means water moves through the profile at a steady rate, preventing the 'wet feet' that can kill garden plants. It is a stable choice for building foundations and landscaping alike.
Flourishing Gardens in Zone 5b
Winnebago's 5b hardiness zone and silt loam soil are ideal for growing everything from peppers to fruit trees. The well-drained nature of the land makes it particularly good for sensitive perennials. This is a great place to start a backyard orchard or a large vegetable patch.
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
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 Winnebago County have?
Winnebago County's soil is classified as Silt loam. This indicates the relative proportions of sand, silt, and clay — 38% sand, 38% silt, and 16% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Winnebago County's soil acidic or alkaline?
Winnebago 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 Winnebago County?
Winnebago 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 Winnebago County's soil?
Based on Winnebago County's Silt loam texture, pH of 5.9, 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 Winnebago County?
Winnebago 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: Winnebago County
Soil Verdict
Winnebago 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
Winnebago County closely matches the Wisconsin average hardiness conditions. The zone range of 5a-5b within the county means soil and planting decisions should account for local elevation and topography.
Planning your lawn? View lawn care data for Winnebago County on LawnByCounty.com →
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.