St. Louis County Soil Data
St. Louis County, Minnesota
USDA SSURGO / PHZMAvg pH
N/A
Texture
Unknown
Drainage
N/A
Organic Matter
N/A
Hydrologic Group
N/A
Data Story
About Soil in St. Louis County, Minnesota
The Diverse Soils of the North
St. Louis County features a wide range of soil conditions, though specific pH and taxonomic data for this set is limited. Generally, northern Minnesota soils are shaped by glacial activity and dense forests. Local testing is recommended to find your specific soil's identity.
Varied Textures Across the County
Precise percentages for sand, silt, and clay are not available in this dataset for St. Louis County. In this region, textures can vary wildly from heavy clay near Lake Superior to rocky till in the Arrowhead. Observation of your local plot is the best way to understand its workability.
Natural Organic Forest Floors
While specific organic matter and water capacity figures are missing, the region is known for its high-organic forest soils. These soils often require amendments like compost to boost productivity for traditional garden vegetables. The natural fertility of the North Woods supports massive timber and berry growth.
Complex Drainage Patterns
Drainage in this large county depends heavily on local topography and bedrock depth. Without a dominant hydrologic group on record, growers should watch for seasonal ponding or rapid runoff in sloped areas. Understanding your local watershed is key for any construction or large planting.
Resilient Gardening in Zone 3b
St. Louis County faces the tough winters of Zone 3b, requiring extremely cold-hardy varieties. Focus on short-season crops like kale, radishes, and native berries that love the northern climate. Despite the challenges, the rugged landscape offers a rewarding environment for dedicated gardeners.
Soil Composition
Composition data not available for this county.
Soil pH
pH data not available for this county.
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: Unknown
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
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Browse Soil AmendmentsFrequently Asked Questions
What type of soil does St. Louis County have?
St. Louis County's soil is classified as Unknown. This indicates the relative proportions of sand, silt, and clay — sand percentage unavailable, silt percentage unavailable, and clay percentage unavailable. Sandy soils drain quickly but may need more frequent irrigation and fertilization.
Is St. Louis County's soil acidic or alkaline?
pH data is not available for St. Louis County.
What is the drainage class for St. Louis County?
Drainage class data is not currently available for St. Louis County.
What crops or plants grow well in St. Louis County's soil?
Based on St. Louis County's Unknown texture, soil pH, and drainage class, the soil is well suited for a variety of crops depending on local conditions.
What USDA soil order is found in St. Louis County?
The dominant USDA soil order for St. Louis County is not currently available in our dataset.
Soil & Planting Advisory: St. Louis County
Soil Verdict
St. Louis County is in USDA hardiness zone 3b, a very cold climate zone. where winter lows can reach -35°F. Soils here experience deep freeze cycles that can disrupt structure, kill shallow roots, and slow microbial activity for months each year.
Planting Guidance
Focus on cold-hardy perennials, native grasses, and conifers. The short growing window favors plants with low heat requirements. 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
Deep winter freezing can create soil heaving that pushes shallow-rooted plants out of the ground; add 3-4 inches of organic mulch each fall. Soil drainage is critical — frozen, waterlogged soil kills roots faster than cold alone. When soil temperatures drop below freezing, microbial nitrogen cycling stops; spring fertilization is more effective than late-fall application.
Regional Context
St. Louis County is somewhat cooler than the Minnesota statewide average. The zone range of 3a-5a within the county means soil and planting decisions should account for local elevation and topography.
Planning your lawn? View lawn care data for St. Louis 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.