Northampton County Soil Data
Northampton County, Virginia
USDA SSURGO / PHZMAvg pH
5.7
Texture
Loamy Sand
Drainage
N/A
Organic Matter
1.7%
Hydrologic Group
N/A
Data Story
About Soil in Northampton County, Virginia
Sandy Shores and Acidic Profiles
Northampton County features a pH of 5.65, which is more acidic than the national median of 6.5. This score is slightly more alkaline than the Virginia state average of 5.23, reflecting its coastal location.
Dominated by Coastal Sands
The soil is a staggering 77.3% sand, with only 7.1% clay and 15.6% silt. This high sand content ensures rapid drainage but makes it difficult for the soil to retain nutrients.
Low Capacity for Water
Organic matter sits at 1.75%, trailing the state average of 2.90%. The available water capacity is just 0.082 in/in, which is significantly lower than the state average of 0.143, indicating a high need for irrigation.
Rapid Drainage on the Coast
The 77.3% sand composition suggests very high permeability and excellent drainage for farming. However, this means water moves through the profile quickly, requiring careful management of runoff and fertilizers.
The Sweet Potato Capital
The sandy soils and Zone 8a climate are perfect for crops like sweet potatoes and peppers. Add organic matter to boost your soil's 1.75% baseline and watch your garden thrive.
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 5.7. These products help balance soil pH for healthier grass.
Browse Soil AmendmentsFrequently Asked Questions
What type of soil does Northampton County have?
Northampton County's soil is classified as Loamy Sand. This indicates the relative proportions of sand, silt, and clay — 77% sand, 16% silt, and 7% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Northampton County's soil acidic or alkaline?
Northampton County's soil has a pH of 5.7, which is moderately acidic. This range suits many crops and is common across much of the eastern US.
What is the drainage class for Northampton County?
Drainage class data is not currently available for Northampton County.
What crops or plants grow well in Northampton County's soil?
Based on Northampton County's Loamy Sand texture, pH of 5.7, 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 Northampton County?
The dominant USDA soil order for Northampton County is not currently available in our dataset.
Soil & Planting Advisory: Northampton County
Soil Verdict
Northampton County is in USDA hardiness zone 8a, a warm climate zone. where winter lows can reach 10°F. Mild winters mean soil rarely freezes deeply, allowing year-round microbial activity and faster organic matter breakdown.
Planting Guidance
Warm-season crops, citrus relatives, and heat-loving ornamentals do well. Cool-season vegetables should be planted in fall and winter. 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
Warm soils accelerate organic matter breakdown, so compost and mulch need replenishing more frequently than in cooler zones. Sandy soils common in warm zones drain quickly; water-retentive amendments like compost or peat help hold moisture.
Regional Context
Northampton County is somewhat warmer than the Virginia statewide average.
Planning your lawn? View lawn care data for Northampton County 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.