Seward County Soil Data
Seward County, Nebraska
USDA SSURGO / PHZMAvg pH
6.4
Texture
Silty clay loam
Drainage
Well drained
Organic Matter
3.5%
Hydrologic Group
B
Data Story
About Soil in Seward County, Nebraska
Rich Alfisols of Seward County
Seward County features Alfisols with an average pH of 6.41, sitting just below the national median of 6.5. This county earns an impressive soil score of 79.2, one of the highest in the region. These soils are naturally fertile and have a history of high agricultural productivity.
Dense Silty Clay Loam Structure
The soil is a silty clay loam, containing 53.7% silt and 27.5% clay. This fine texture is excellent for holding onto nutrients and providing a sturdy anchor for plant roots. While it can be heavy to work when wet, its productivity is difficult to beat.
Peak Organic Matter and Moisture
Organic matter is outstanding at 3.53%, surpassing the state average of 3.32% and the national 2.0%. Available water capacity is also elite at 0.202 in/in. This soil is a nutrient powerhouse that holds massive amounts of water for plant use.
Well Drained and Stable Hydrology
These soils are well drained and classified in Hydrologic Group B. This is an ideal combination, as it provides a moderate infiltration rate while ensuring excess water moves away from roots. It is arguably the most versatile soil type for both farming and urban development.
A Gardener's Dream in Zone 5b
Zone 5b gardeners can grow almost anything here, from heirloom tomatoes to vibrant flower beds. The high organic matter means you will need less fertilizer than your neighbors in other counties. Start your garden today to take advantage of some of Nebraska's best soil.
Soil Composition
Soil pH
Soil Series
Detailed soil series data not yet available for this county.
Hydrologic Group
Group B — Moderate Runoff
Moderately deep, moderately well-drained soils with moderate infiltration rates. Good balance of drainage and water retention.
Drainage Class
Well drained
Water is removed from the soil readily but not rapidly. Optimal for most plants and construction.
Soil Profile
Dominant texture: Silty clay loam
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Clay Soil Detected
Clay soils can struggle with drainage. These products improve soil structure and water flow.
Browse Soil AmendmentsFrequently Asked Questions
What type of soil does Seward County have?
Seward County's soil is classified as Silty clay loam. This indicates the relative proportions of sand, silt, and clay — 19% sand, 54% silt, and 27% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Seward County's soil acidic or alkaline?
Seward County's soil has a pH of 6.4, which is moderately acidic. This range suits many crops and is common across much of the eastern US.
What is the drainage class for Seward County?
Seward 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 Seward County's soil?
Based on Seward County's Silty clay loam texture, pH of 6.4, 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 Seward County?
Seward 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: Seward County
Soil Verdict
Seward 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
Seward County closely matches the Nebraska average hardiness conditions. The zone range of 5b-6a within the county means soil and planting decisions should account for local elevation and topography.
Planning your lawn? View lawn care data for Seward County on LawnByCounty.com →
Other Counties in Nebraska
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.