Delaware County Soil Data
Delaware County, Pennsylvania
USDA SSURGO / PHZMAvg pH
5.7
Texture
Loam
Drainage
N/A
Organic Matter
3.8%
Hydrologic Group
N/A
Data Story
About Soil in Delaware County, Pennsylvania
The State's Mildest Soils
Delaware County boasts an average pH of 5.71, the highest in this group and far above the state average of 5.22. This brings it much closer to the national median of 6.5, creating a very hospitable environment for many plants.
Rich Silt and Clay Mix
The soil composition is 49.2% silt, 32.7% sand, and 17.0% clay. This high silt and clay content helps the soil lock in nutrients and maintain structure better than the sandier soils of neighboring regions.
Excellent Water Retention
The available water capacity of 0.157 in/in is better than the state average of 0.151 in/in. Although organic matter is 3.75%, the soil remains much richer than the 2.0% national average, supporting vibrant plant growth.
Moisture-Retentive Land
While specific drainage classes are not provided, the high clay and silt levels suggest the soil holds onto moisture effectively. Homeowners should ensure proper drainage around foundations to manage this high water capacity.
Extended Growing in 7b
As part of hardiness zone 7b, Delaware County enjoys one of the longest growing seasons in Pennsylvania. Your moisture-rich soil is perfect for hydrangeas and heat-tolerant summer vegetables.
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
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 Delaware County have?
Delaware County's soil is classified as Loam. This indicates the relative proportions of sand, silt, and clay — 33% sand, 49% silt, and 17% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Delaware County's soil acidic or alkaline?
Delaware 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 Delaware County?
Drainage class data is not currently available for Delaware County.
What crops or plants grow well in Delaware County's soil?
Based on Delaware County's Loam 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 Delaware County?
The dominant USDA soil order for Delaware County is not currently available in our dataset.
Soil & Planting Advisory: Delaware County
Soil Verdict
Delaware County is in USDA hardiness zone 7b, a moderate climate zone. where winter lows can reach 5°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
Delaware County is somewhat warmer than the Pennsylvania statewide average. The zone range of 7a-8a within the county means soil and planting decisions should account for local elevation and topography.
Planning your lawn? View lawn care data for Delaware County on LawnByCounty.com →
Other Counties in Pennsylvania
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.