Fairfax city Soil Data
Fairfax city, Virginia
Avg pH
5.9
Texture
Loam
Drainage
N/A
Organic Matter
1.5%
Hydrologic Group
N/A
Data Story
About Soil in Fairfax city, Virginia
A Moderately Acidic Urban Profile
Fairfax city features an average pH of 5.92, which is notably less acidic than the Virginia state average of 5.23. While this remains below the national median of 6.5, the city's soil represents a more balanced profile than many of its neighbors. Local taxonomic data remains limited, reflecting the highly developed urban environment.
Silt-Heavy Mix for Moderate Workability
The soil contains 47.7% silt, 33.1% sand, and 19.2% clay. This high silt concentration creates a smooth texture that retains moisture better than sandy soils but requires careful management to avoid compaction. The relatively low clay percentage helps maintain decent workability for city landscaping.
Water Capacity Outperforms State Average
Organic matter sits at 1.52%, falling below the state average of 2.90% and the national average of 2.0%. Despite lower organic levels, the soil boasts an available water capacity of 0.165 in/in, which is significantly higher than the Virginia average of 0.143 in/in. This suggests a strong ability to sustain plants during dry urban summers.
Limited Drainage and Hydrologic Data
Official drainage class and hydrologic group data are unavailable for this urban center. Given the high silt content and urban setting, gardeners should monitor for surface runoff during heavy rains. Incorporating compost can help improve the structure where natural data is sparse.
Start Your Urban Garden Oasis
While specific hardiness zone data is unavailable in the set, regional neighbors thrive in zone 7. The high water capacity makes this soil excellent for moisture-loving perennials and ornamental shrubs. Start a raised bed today to maximize the potential of your Fairfax city space.
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: Loam
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Frequently Asked Questions
What type of soil does Fairfax city have?
Fairfax city's soil is classified as Loam. This indicates the relative proportions of sand, silt, and clay — 33% sand, 48% silt, and 19% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Fairfax city's soil acidic or alkaline?
Fairfax city'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 Fairfax city?
Drainage class data is not currently available for Fairfax city.
What crops or plants grow well in Fairfax city's soil?
Based on Fairfax city's 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 Fairfax city?
The dominant USDA soil order for Fairfax city is not currently available in our dataset.
Planning your lawn? View lawn care data for Fairfax city on LawnByCounty.com →
Other Counties in Virginia
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.