Delta County Soil Data
Delta County, Michigan
USDA SSURGO / PHZMAvg pH
5.3
Texture
Loam
Drainage
N/A
Organic Matter
23.0%
Hydrologic Group
N/A
Data Story
About Soil in Delta County, Michigan
Balanced Acidity in the Central U.P.
Delta County's average pH of 5.33 perfectly matches the state average, though it remains more acidic than the national 6.5 median. This level of acidity is typical for many Michigan forest and farm lands.
Sandy-Silt Mix with Low Clay
The soil is composed of 52.0% sand and 28.5% silt, with only 7.5% clay. This light texture prevents compaction and makes the ground very easy to dig and manage for gardening.
Healthy Fertility and Water Capacity
Organic matter is strong at 22.95%, beating the state average of 19.76%. An available water capacity of 0.214 in/in ensures that crops have a better-than-average reservoir of moisture during the summer.
Moderate Permeability for Land Use
While specific drainage classes are not listed, the high sand and silt content suggest moderate to fast permeability. These traits generally favor agricultural use by reducing the risk of long-term saturated roots.
Productive Gardening in Zone 5a
Zone 5a supports a wide range of hardy Michigan staples, from root vegetables to orchards. The above-average fertility and solid water retention make Delta County an inviting spot for any new gardener.
Soil Composition
Soil pH
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: Loam
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Acidic Soil Detected
Your county's average pH is 5.3. These products help balance soil pH for healthier grass.
Browse Soil AmendmentsFrequently Asked Questions
What type of soil does Delta County have?
Delta County's soil is classified as Loam. This indicates the relative proportions of sand, silt, and clay — 52% sand, 29% silt, and 7% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Delta County's soil acidic or alkaline?
Delta County's soil has a low pH of 5.3, which is strongly acidic. Acidic soils benefit from lime applications to raise pH and improve nutrient availability.
What is the drainage class for Delta County?
Drainage class data is not currently available for Delta County.
What crops or plants grow well in Delta County's soil?
Based on Delta County's Loam texture, pH of 5.3, and drainage class, the soil is well suited for acid-loving plants like blueberries and azaleas, row crops and vegetable gardens.
What USDA soil order is found in Delta County?
The dominant USDA soil order for Delta County is not currently available in our dataset.
Soil & Planting Advisory: Delta County
Soil Verdict
Delta 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
Delta County closely matches the Michigan average hardiness conditions. The zone range of 4b-5b within the county means soil and planting decisions should account for local elevation and topography.
Planning your lawn? View lawn care data for Delta 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.