Custer County Soil Data
Custer County, Idaho
USDA SSURGO / PHZMAvg pH
N/A
Texture
Unknown
Drainage
N/A
Organic Matter
N/A
Hydrologic Group
N/A
Data Story
About Soil in Custer County, Idaho
Rugged Terrain Awaits Detailed Mapping
Custer County's dominant soil taxonomic order and pH level are currently unrecorded. Local soils exist within a state average pH of 6.04, which is lower than the national median of 6.5.
Assessing Texture for High Altitudes
This county currently lacks specific data for sand, silt, and clay composition. These metrics typically define how well the ground holds nutrients and how easily it can be tilled.
Water Capacity and Nutrient Potential
Custer lacks local fertility data, though the state's average soil score is 67.8 out of 100. Idaho's high average organic matter of 27.53% suggests the region has great potential for enrichment.
Hydrologic Groups and Land Use
The dominant drainage class is not yet assigned for this territory. Identifying these classes is vital for preventing erosion and managing irrigation in the local valleys.
Selecting Plants for Zone 5b
Located in USDA Hardiness Zone 5b, Custer County supports hardy crops. Gardeners should focus on short-season varieties like peas and root vegetables that tolerate cooler nights.
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 Custer County have?
Custer 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 Custer County's soil acidic or alkaline?
pH data is not available for Custer County.
What is the drainage class for Custer County?
Drainage class data is not currently available for Custer County.
What crops or plants grow well in Custer County's soil?
Based on Custer 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 Custer County?
The dominant USDA soil order for Custer County is not currently available in our dataset.
Soil & Planting Advisory: Custer County
Soil Verdict
Custer 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
Custer County is somewhat cooler than the Idaho statewide average. The zone range of 5a-5b within the county means soil and planting decisions should account for local elevation and topography.
Planning your lawn? View lawn care data for Custer County on LawnByCounty.com →
Other Counties in Idaho
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.