Webster County Soil Data
Webster County, Iowa
USDA SSURGO / PHZMAvg pH
6.7
Texture
Loam
Drainage
N/A
Organic Matter
5.3%
Hydrologic Group
N/A
Data Story
About Soil in Webster County, Iowa
Sweet and Productive Webster Soil
Webster County soil has an average pH of 6.65, which is slightly more alkaline than the national median of 6.5. This near-neutral pH is ideal for nutrient uptake, reducing the need for chemical adjustments. It is one of the more chemically balanced soils in the state for general agriculture.
High Sand and Silt Balance
This county has a unique mix of 36.4% sand and 38.5% silt, along with 24.1% clay. The higher sand content compared to southern neighbors improves aeration and makes the soil easier to work. It strikes a rare balance between good drainage and enough clay to hold onto vital nutrients.
Exceptional Organic Matter Levels
Webster County shines with an organic matter content of 5.27%, far exceeding the state average of 3.81%. While the water capacity of 0.190 in/in is slightly below the state average, the high organic content makes this soil incredibly fertile. This is some of the richest earth in the region for intense cultivation.
Efficient Infiltration in Webster
The increased sand content likely leads to better natural drainage than seen in more clay-heavy counties. While specific drainage classes are not provided, this composition typically allows for faster field entry after spring rains. This makes it a preferred area for farmers who need to time their planting precisely.
Vigorous Growth in Zone 5a
In Hardiness Zone 5a, the growing season is slightly shorter, but the rich organic matter more than compensates. This soil is perfect for heavy-producing vegetable gardens and vibrant flower beds. Use this fertile ground to grow award-winning produce right in your backyard.
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: 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 Webster County have?
Webster County's soil is classified as Loam. This indicates the relative proportions of sand, silt, and clay — 36% sand, 39% silt, and 24% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Webster County's soil acidic or alkaline?
Webster County's soil has a pH of 6.7, which is near neutral. This range is ideal for most garden plants and field crops.
What is the drainage class for Webster County?
Drainage class data is not currently available for Webster County.
What crops or plants grow well in Webster County's soil?
Based on Webster County's Loam texture, pH of 6.7, 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 Webster County?
The dominant USDA soil order for Webster County is not currently available in our dataset.
Soil & Planting Advisory: Webster County
Soil Verdict
Webster County is in USDA hardiness zone 5a, a cold climate zone. where winter lows can reach -20°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. With extreme winter lows, any marginally hardy plants need heavy mulch and wind protection. 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
Webster County closely matches the Iowa average hardiness conditions.
Planning your lawn? View lawn care data for Webster County on LawnByCounty.com →
Other Counties in Iowa
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.