Charles County Soil Data
Charles County, Maryland
Avg pH
4.6
Texture
Silt loam
Drainage
Well drained
Organic Matter
6.1%
Hydrologic Group
B
Data Story
About Soil in Charles County, Maryland
Acidic Alfisols define the Charles landscape
This county features a dominant silt loam texture belonging to the Alfisols taxonomic order. With an average pH of 4.64, these soils are much more acidic than the national median of 6.5 and the state average of 5.31. This high acidity requires careful management for sensitive crops.
A balanced mix of sand and silt
The soil composition consists of 46.8% sand, 38.1% silt, and 11.4% clay. This specific ratio creates a silt loam that is relatively easy to work while maintaining structural integrity. The moderate clay content ensures the soil doesn't crumble as easily as pure sand.
Superior water capacity boosts growing potential
With an organic matter content of 6.08%, this soil far exceeds the national average of 2.0% but trails the state average of 9.10%. Crucially, its available water capacity of 0.198 in/in beats the state average of 0.175 in/in. This high capacity helps plants thrive during dry spells by holding moisture longer.
Well-drained land for versatile use
Classified as well-drained and belonging to hydrologic group B, these soils move water efficiently. This makes the land excellent for diverse farming and reliable for residential building projects. You rarely find standing water here compared to poorly drained coastal areas.
Success in Zone 7b's humid climate
Charles County sits in hardiness zone 7b, which pairs perfectly with its well-drained silt loam. Vegetables like tomatoes and peppers thrive in this environment with proper lime application to balance the 4.64 pH. Start your garden today to take advantage of this reliable water-retaining soil.
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
Well drained
Water is removed from the soil readily but not rapidly. Optimal for most plants and construction.
Soil Profile
Dominant texture: Silt loam
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Frequently Asked Questions
What type of soil does Charles County have?
Charles County's soil is classified as Silt loam. This indicates the relative proportions of sand, silt, and clay — 47% sand, 38% silt, and 11% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Charles County's soil acidic or alkaline?
Charles 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 Charles County?
Charles County has a dominant drainage class of "Well drained." Well-drained soils allow excess water to move through quickly, reducing waterlogging risk and supporting most field and garden crops.
What crops or plants grow well in Charles County's soil?
Based on Charles County's Silt loam texture, pH of 4.6, and Well drained, the soil is well suited for acid-loving plants like blueberries and azaleas, row crops and vegetable gardens, most annual and perennial crops.
What USDA soil order is found in Charles County?
Charles County's dominant soil order is Alfisols. Alfisols are moderate to high base-status soils with a clay-enriched subsoil. They support productive forests and cropland across temperate regions.
Planning your lawn? View lawn care data for Charles County on LawnByCounty.com →
Other Counties in Maryland
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.