Grant Parish Soil Data
Grant Parish, Louisiana
USDA SSURGO / PHZMAvg pH
6.0
Texture
Loam
Drainage
N/A
Organic Matter
1.9%
Hydrologic Group
D
Data Story
About Soil in Grant Parish, Louisiana
Near-neutral soils in Grant Parish
Grant Parish features a pH of 6.01, which is significantly more alkaline than the Louisiana average of 5.74. This puts it closer to the national median of 6.5, making it versatile for a wider range of plant species.
Sandy loam characteristics favor drainage
The soil contains 30.7% sand, the highest in this group, alongside 44.0% silt and 25.2% clay. This balanced distribution provides better natural drainage and easier tilling than the silt-heavy soils found elsewhere.
Below-average water storage and organic matter
Available water capacity sits at 0.169 in/in, falling short of the state average of 0.182. Organic matter is also low at 1.88%, meaning regular fertilization and mulching are needed to sustain healthy plant growth.
High runoff potential in Group D
The parish is classified under Hydrologic Group D, indicating very low infiltration rates when saturated. Despite the higher sand content, the soil structure can still lead to significant runoff during heavy Louisiana rainstorms.
Fruit trees and timber in Zone 9a
The higher sand content and moderate pH in Zone 9a make Grant Parish excellent for peaches and pine timber. Dig into your soil this spring to capitalize on one of the most balanced pH profiles in the state.
Soil Composition
Soil pH
Soil Series
Detailed soil series data not yet available for this county.
Hydrologic Group
Group D — High Runoff
Clay soils with very slow infiltration rates. Highest runoff potential. These soils have a permanent high water table or are shallow over impervious material.
Drainage Class
Drainage class data not available.
Soil Profile
Dominant texture: Loam
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Soil Amendment Products
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Browse Soil AmendmentsFrequently Asked Questions
What type of soil does Grant Parish have?
Grant Parish's soil is classified as Loam. This indicates the relative proportions of sand, silt, and clay — 31% sand, 44% silt, and 25% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Grant Parish's soil acidic or alkaline?
Grant Parish'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 Grant Parish?
Drainage class data is not currently available for Grant Parish.
What crops or plants grow well in Grant Parish's soil?
Based on Grant Parish's Loam texture, pH of 6.0, 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 Grant Parish?
The dominant USDA soil order for Grant Parish is not currently available in our dataset.
Soil & Planting Advisory: Grant Parish
Soil Verdict
Grant Parish 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
Grant Parish closely matches the Louisiana average hardiness conditions.
Planning your lawn? View lawn care data for Grant 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.