Custer County Soil Data
Custer County, South Dakota
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, South Dakota
The rugged soils of the Black Hills
Custer County's complex topography means soil data is limited and varies wildly by elevation. While a specific average pH is not available, the surrounding mountain soils often vary from acidic forest floors to alkaline valley floors.
Variable textures across the peaks
Specific percentages for sand, silt, and clay are not mapped in this dataset due to the rocky terrain. The soil texture here ranges from thin, rocky layers on ridges to deeper sediments in the mountain meadows.
Organic life in the forest
While available water capacity and organic matter averages are N/A, the region's forests suggest pockets of rich organic litter. Gardening here often requires raised beds to overcome the shallow, rocky soil typical of the area.
Fast runoff and mountain drainage
Hydrologic data is limited, but the steep slopes of Custer County generally lead to rapid water runoff. Proper site selection is key to finding areas where water and soil actually collect.
Gardening in zone 5a
Despite the rugged land, Custer sits in Zone 5a. You can grow beautiful mountain gardens featuring native wildflowers and cold-tolerant herbs, provided you have enough soil depth.
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 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
Custer County is somewhat warmer than the South Dakota 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 South Dakota
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.