Jefferson Parish Soil Data
Jefferson Parish, Louisiana
Avg pH
5.9
Texture
Silty Clay Loam
Drainage
N/A
Organic Matter
24.7%
Hydrologic Group
N/A
Data Story
About Soil in Jefferson Parish, Louisiana
Rich, dark soils near the coast
Jefferson Parish boasts a Soil Score of 85.9, driven by an average pH of 5.94. This pH is closer to the national median of 6.5 than most Louisiana counties, creating a more neutral environment for plant growth.
Dense clay dominates the landscape
The soil contains 35.9% clay and only 12.0% sand, leading to a heavy, nutrient-rich texture. While this mix provides excellent nutrient retention, it can be difficult to work and slow to drain after heavy storms.
Exceptional organic matter levels
The parish contains a massive 24.69% organic matter, nearly four times the 6.38% state average. This results in a high available water capacity of 0.220 in/in, providing plants with a deep reservoir of moisture.
Managed hydrology in a wet environment
With high clay and organic content, these soils naturally hold significant amounts of water. While specific drainage class data is unavailable, the physical composition suggests a landscape that remains saturated longer than inland parishes.
Subtropical gardening in Zone 9b
The mild winters of zone 9b and nutrient-dense soil support citrus trees and tropical ornamentals. Gardeners should focus on raised beds to manage the heavy clay and take advantage of the incredible fertility.
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: Silty Clay Loam
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Frequently Asked Questions
What type of soil does Jefferson Parish have?
Jefferson Parish's soil is classified as Silty Clay Loam. This indicates the relative proportions of sand, silt, and clay — 12% sand, 26% silt, and 36% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Jefferson Parish's soil acidic or alkaline?
Jefferson Parish's soil has a pH of 5.9, which is moderately acidic. This range suits many crops and is common across much of the eastern US.
What is the drainage class for Jefferson Parish?
Drainage class data is not currently available for Jefferson Parish.
What crops or plants grow well in Jefferson Parish's soil?
Based on Jefferson Parish's Silty Clay Loam texture, pH of 5.9, and drainage class, the soil is well suited for vegetables, grains, and most field crops, row crops and vegetable gardens.
What USDA soil order is found in Jefferson Parish?
The dominant USDA soil order for Jefferson Parish is not currently available in our dataset.
Planning your lawn? View lawn care data for Jefferson Parish on LawnByCounty.com →
Other Counties in Louisiana
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.