Effingham County Soil Data
Effingham County, Georgia
USDA SSURGO / PHZMAvg pH
4.9
Texture
Loamy Sand
Drainage
N/A
Organic Matter
5.7%
Hydrologic Group
N/A
Data Story
About Soil in Effingham County, Georgia
Acidic Entisols Near the Coast
Effingham County's soil belongs to the Entisol order, characterized by its relatively young developmental stage. The average pH is a very acidic 4.89, significantly lower than the national median of 6.5 and the Georgia state average of 5.26. This acidity requires careful lime management for most traditional agriculture.
Dominated by Coastal Sands
The soil is overwhelmingly sandy, comprising 78.6% of its profile, with only 7.6% clay and 9.5% silt. This high sand content ensures excellent workability but limits the soil's natural ability to hold onto nutrients. Growers must manage fertilization carefully to prevent leaching through the porous structure.
Impressive Organic Reserves
Despite its sandy nature, Effingham boasts a high organic matter content of 5.74%, which is triple the state average of 1.83%. The available water capacity (AWC) is 0.109 in/in, slightly below the state average of 0.114. This high organic matter provides a critical buffer for nutrient retention and moisture.
Rapid Drainage Challenges
As an Entisol-dominated landscape, the county generally experiences rapid drainage through its sandy layers. While specific drainage classes are not mapped, the high sand percentage suggests a need for consistent irrigation during dry spells. Builders benefit from the stability of sand, though it offers little filtration for runoff.
Thriving in the 9a Zone
Hardiness zone 9a allows for a diverse range of crops, including citrus and heat-loving summer annuals. The high organic matter makes this soil surprisingly productive if you manage the sharp acidity with regular testing. Grab a shovel and start your garden in this unique coastal soil today.
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: Loamy Sand
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Acidic Soil Detected
Your county's average pH is 4.9. These products help balance soil pH for healthier grass.
Browse Soil AmendmentsFrequently Asked Questions
What type of soil does Effingham County have?
Effingham County's soil is classified as Loamy Sand. This indicates the relative proportions of sand, silt, and clay — 79% sand, 9% silt, and 8% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Effingham County's soil acidic or alkaline?
Effingham County's soil has a low pH of 4.9, which is strongly acidic. Acidic soils benefit from lime applications to raise pH and improve nutrient availability.
What is the drainage class for Effingham County?
Drainage class data is not currently available for Effingham County.
What crops or plants grow well in Effingham County's soil?
Based on Effingham County's Loamy Sand texture, pH of 4.9, 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 Effingham County?
Effingham County's dominant soil order is Entisols. Entisols are recently formed soils with little to no horizon development. They are common on floodplains, steep slopes, and sandy deposits.
Soil & Planting Advisory: Effingham County
Soil Verdict
Effingham County is in USDA hardiness zone 9a, a warm climate zone. where winter lows can reach 20°F. Warm winters keep soil biology active nearly year-round, accelerating decomposition but increasing pest and disease pressure in topsoil.
Planting Guidance
Tropical and subtropical plants are viable. Year-round gardening is possible, though summer heat may limit some cool-season crops. Frost is rare; tender plants can overwinter with minimal 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
Rapid organic matter turnover means soils can become nutrient-poor quickly; test annually and fertilize based on results. High soil temperatures favor certain soilborne pathogens; practice crop rotation and avoid overwatering.
Regional Context
Effingham County is somewhat warmer than the Georgia statewide average. The zone range of 8b-9a within the county means soil and planting decisions should account for local elevation and topography.
Planning your lawn? View lawn care data for Effingham County on LawnByCounty.com →
Other Counties in Georgia
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.