Alger County Soil Data
Alger County, Michigan
USDA SSURGO / PHZMAvg pH
4.6
Texture
Sand
Drainage
N/A
Organic Matter
56.9%
Hydrologic Group
A
Data Story
About Soil in Alger County, Michigan
The Most Acidic Soils in the Region
Alger County features an average pH of 4.57, which is among the lowest in the state and far below the national 6.5 median. This sandy soil is highly acidic, making it a unique environment for specialized native plants. Managing this acidity is the first step for any prospective local gardener.
A Unique Sand and Silt Mix
The soil composition is primarily sand and silt, with a very low clay content of just 1.2%. This creates a loose, workable structure that provides excellent root aeration. However, the lack of clay means the soil has very little natural 'glue' to hold onto minerals.
Explosive Organic Matter Levels
Alger County boasts a staggering 56.92% organic matter, nearly triple the Michigan state average of 19.76%. This high organic content drives a superior available water capacity of 0.371 in/in, which is nearly double the state benchmark. This soil acts like a sponge, effectively counteracting its low clay content.
Excellent Infiltration via Group A
Classified in Hydrologic Group A, these soils allow water to infiltrate very rapidly. This high permeability minimizes runoff and erosion, though it can lead to nutrient leaching in heavy rains. Drainage class data is limited, but the hydrologic group suggests a very well-drained profile.
Blueberries and Bog Plants Rejoice
The cold climate of Zone 5a combined with extremely acidic, organic soil is perfect for acid-loving crops like blueberries, cranberries, and azaleas. Your garden has a massive head start on moisture retention thanks to that high organic matter. Embrace the unique chemistry of Alger County to grow a lush, northern landscape.
Soil Composition
Soil pH
Soil Series
Detailed soil series data not yet available for this county.
Hydrologic Group
Group A — Low Runoff
Sandy, well-drained soils with high infiltration rates. Water moves quickly through the soil profile. Lowest runoff potential when thoroughly wetted.
Drainage Class
Drainage class data not available.
Soil Profile
Dominant texture: Sand
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Acidic Soil Detected
Your county's average pH is 4.6. These products help balance soil pH for healthier grass.
Browse Soil AmendmentsFrequently Asked Questions
What type of soil does Alger County have?
Alger County's soil is classified as Sand. This indicates the relative proportions of sand, silt, and clay — 19% sand, 14% silt, and 1% clay. Sandy soils drain quickly but may need more frequent irrigation and fertilization.
Is Alger County's soil acidic or alkaline?
Alger County's soil has a low pH of 4.6, which is strongly acidic. Acidic soils benefit from lime applications to raise pH and improve nutrient availability.
What is the drainage class for Alger County?
Drainage class data is not currently available for Alger County.
What crops or plants grow well in Alger County's soil?
Based on Alger County's Sand texture, pH of 4.6, and drainage class, the soil is well suited for acid-loving plants like blueberries and azaleas, drought-tolerant crops, root vegetables, and sandy-soil specialists.
What USDA soil order is found in Alger County?
The dominant USDA soil order for Alger County is not currently available in our dataset.
Soil & Planting Advisory: Alger County
Soil Verdict
Alger 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
Alger County closely matches the Michigan average hardiness conditions. 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 Alger County on LawnByCounty.com →
Other Counties in Michigan
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.