Roosevelt County Soil Data
Roosevelt County, Montana
USDA SSURGO / PHZMAvg pH
N/A
Texture
Unknown
Drainage
N/A
Organic Matter
N/A
Hydrologic Group
N/A
Data Story
About Soil in Roosevelt County, Montana
The Great Plains Profile
Official pH and taxonomic data for Roosevelt County are not included in the current record. Most soils in this region of Montana trend toward the state average pH of 7.43, which is significantly more alkaline than the national median of 6.5. This alkalinity is typical for the semi-arid northern plains.
High Plains Texture Varieties
Specific percentages for sand, silt, and clay are currently unavailable for this county. Local landscapes typically feature glacial till and alluvial deposits from the nearby Missouri River. These materials create a complex mosaic of drainage patterns across the county's vast acreage.
Dryland Fertility and Capacity
Roosevelt County lacks specific organic matter and water capacity data in this set. Throughout the state, an average organic matter of 2.54% sustains the local agriculture industry. Maintaining ground cover is critical here to preserve whatever moisture and organic material the soil holds.
Navigating the Missouri Watershed
With no dominant drainage class or hydrologic group recorded, builders and farmers must rely on local site assessments. Proximity to the Missouri River can lead to highly variable water tables and drainage speeds. Proper drainage is the primary concern for any new construction or intensive farming.
Planting for Success in Zone 4a
A Hardiness Zone of 4a means plants must survive temperatures as low as -30°F. Local growers find success with prairie-hardy shrubs, grains, and short-season root vegetables. Focus on windbreaks to protect your garden from the persistent plains winds.
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
Soil Amendment Products
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Browse Soil AmendmentsFrequently Asked Questions
What type of soil does Roosevelt County have?
Roosevelt 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 Roosevelt County's soil acidic or alkaline?
pH data is not available for Roosevelt County.
What is the drainage class for Roosevelt County?
Drainage class data is not currently available for Roosevelt County.
What crops or plants grow well in Roosevelt County's soil?
Based on Roosevelt 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 Roosevelt County?
The dominant USDA soil order for Roosevelt County is not currently available in our dataset.
Soil & Planting Advisory: Roosevelt County
Soil Verdict
Roosevelt County is in USDA hardiness zone 4a, a cold climate zone. where winter lows can reach -30°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
Roosevelt County closely matches the Montana average hardiness conditions.
Planning your lawn? View lawn care data for Roosevelt County on LawnByCounty.com →
Other Counties in Montana
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.