Washington County Soil Data
Washington County, Minnesota
USDA SSURGO / PHZMAvg pH
5.9
Texture
Loam
Drainage
N/A
Organic Matter
5.6%
Hydrologic Group
N/A
Data Story
About Soil in Washington County, Minnesota
Acidic Soils and Sandy Foundations
Washington County soils are more acidic than most, with an average pH of 5.91 compared to the national median of 6.5. This profile is even lower than the state average of 6.21, suggesting a need for lime in some agricultural applications.
Fast-Draining Sandy Earth
The texture is notably sandy at 48.4%, paired with 38.7% silt and only 11.9% clay. This light, sandy mix ensures fast drainage but may require more frequent watering to keep plants hydrated.
Moderate Fertility and Water Holding
Organic matter sits at 5.64%, which is lower than the state average of 9.90% but remains above the national average of 2.0%. The available water capacity of 0.180 in/in is slightly below the Minnesota benchmark of 0.199.
Managing Rapid Water Movement
Standard drainage and hydrologic classifications are currently unavailable for this specific dataset. However, the high sand content typically prevents the ground from becoming waterlogged even during heavy rains.
Thriving in Hardiness Zone 5a
In Zone 5a, gardeners can thrive with perennials and cold-hardy vegetables. With a soil score of 64.9, this land responds well to consistent organic supplements and careful moisture management.
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
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 Washington County have?
Washington County's soil is classified as Loam. This indicates the relative proportions of sand, silt, and clay — 48% sand, 39% silt, and 12% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Washington County's soil acidic or alkaline?
Washington 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 Washington County?
Drainage class data is not currently available for Washington County.
What crops or plants grow well in Washington County's soil?
Based on Washington County's 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 Washington County?
The dominant USDA soil order for Washington County is not currently available in our dataset.
Soil & Planting Advisory: Washington County
Soil Verdict
Washington 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
Washington County is somewhat warmer than the Minnesota statewide average. The zone range of 4b-5a within the county means soil and planting decisions should account for local elevation and topography.
Planning your lawn? View lawn care data for Washington County on LawnByCounty.com →
Other Counties in Minnesota
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.