Macomb County Soil Data
Macomb County, Michigan
Avg pH
6.0
Texture
Loam
Drainage
Poorly drained
Organic Matter
5.9%
Hydrologic Group
B/D
Data Story
About Soil in Macomb County, Michigan
Productive Mollisols Near the National pH Average
Macomb County's soil consists of Mollisols with an average pH of 6.05, placing it much closer to the national median of 6.5 than the state average of 5.30. These soils are typically dark and rich in nutrients due to their grassland-influenced history. The loam texture provides a versatile foundation for both agriculture and landscaping.
Balanced Loam with Sandy Characteristics
The soil mix contains 56.3% sand, 23.1% silt, and 14.2% clay, creating a classic loamy profile. This composition offers a good balance between drainage from the sand and nutrient retention from the clay. It remains relatively easy to till while providing enough structure to support healthy root systems.
Solid Organic Foundation and Moderate Water Storage
With 5.94% organic matter, Macomb exceeds the national average of 2.0% but falls below the state average of 19.76%. The available water capacity is 0.149 in/in, which is lower than the state average of 0.202. Gardeners should monitor soil moisture during dry Michigan summers to ensure plant health.
Poorly Drained Soil with High Water Table
The dominant soil is poorly drained and falls into the B/D hydrologic group, meaning it has slow infiltration rates when thoroughly wet. These characteristics often necessitate tile drainage for farming or careful site planning for home foundations. Standing water may be a common sight during the spring thaw or heavy rains.
Diverse Planting Options in Zone 6b
A hardiness zone of 6b allows for a wide variety of plants, including peaches, melons, and even some tender perennials. The loamy soil is particularly well-suited for sweet corn and hearty vegetables that enjoy stable nutrient levels. Grab some seeds and take advantage of one of Michigan's longer growing seasons.
Soil Composition
Soil pH
Soil Series
Detailed soil series data not yet available for this county.
Hydrologic Group
Group B — Moderate Runoff
Moderately deep, moderately well-drained soils with moderate infiltration rates. Good balance of drainage and water retention.
Drainage Class
Poorly drained
Water is removed so slowly that the soil is wet at or near the surface much of the year. Drainage improvement usually needed.
Soil Profile
Dominant texture: Loam
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Frequently Asked Questions
What type of soil does Macomb County have?
Macomb County's soil is classified as Loam. This indicates the relative proportions of sand, silt, and clay — 56% sand, 23% silt, and 14% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Macomb County's soil acidic or alkaline?
Macomb County's soil has a pH of 6.0, which is moderately acidic. This range suits many crops and is common across much of the eastern US.
What is the drainage class for Macomb County?
Macomb County has a dominant drainage class of "Poorly drained." Poorly drained soils retain water for extended periods, which can limit crop choices and may require tile drainage or raised beds.
What crops or plants grow well in Macomb County's soil?
Based on Macomb County's Loam texture, pH of 6.0, and Poorly drained, the soil is well suited for vegetables, grains, and most field crops, row crops and vegetable gardens, rice, cranberries, and other water-tolerant species.
What USDA soil order is found in Macomb County?
Macomb County's dominant soil order is Mollisols. Mollisols are fertile, dark-colored soils that formed under grassland vegetation. They are among the most productive agricultural soils in the world.
Planning your lawn? View lawn care data for Macomb 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.