Mercer County Soil Data
Mercer County, Pennsylvania
USDA SSURGO / PHZMAvg pH
5.5
Texture
Loam
Drainage
N/A
Organic Matter
8.5%
Hydrologic Group
N/A
Data Story
About Soil in Mercer County, Pennsylvania
Stronger pH Scores in the West
Mercer County soil is less acidic than many of its neighbors, sporting an average pH of 5.51. While this is still below the national median of 6.5, it is noticeably healthier than the state average of 5.22. This slightly higher pH makes nutrient management easier for local farmers and home gardeners.
High Silt Content Dominates
The soil is comprised of 46.9% silt, 30.5% sand, and 14.9% clay, creating a very silty profile. This mix provides a smooth, flour-like texture that is excellent for seed germination but susceptible to surface crusting after heavy rains. The balanced clay and sand ratio helps maintain a workable structure for most of the year.
Excellent Water Storage Capacity
The county's available water capacity of 0.161 in/in sits above the state average of 0.151 in/in, providing a reliable reservoir for crops. While the organic matter content of 8.46% is lower than the Pennsylvania average of 12.14%, it remains four times higher than the national average. This combination supports consistent growth even through moderate summer heat.
Varying Landscapes and Water Flow
Specific dominant drainage classifications are currently not recorded in the primary dataset for Mercer County. Given the high silt and moderate clay levels, drainage likely varies significantly between the rolling hills and flatter plains. Testing individual backyard drainage is a recommended first step for any new landscaping project.
Diverse Potential in Zone 6a
Falling within USDA Hardiness Zone 6a, Mercer County supports a wide variety of temperate perennials and vegetables. The relatively high water capacity makes it an excellent spot for thirsty crops like sweet corn or leafy greens. Start your garden this spring and take advantage of some of the state's more balanced soil chemistry.
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 5.5. These products help balance soil pH for healthier grass.
Browse Soil AmendmentsFrequently Asked Questions
What type of soil does Mercer County have?
Mercer County's soil is classified as Loam. This indicates the relative proportions of sand, silt, and clay — 30% sand, 47% silt, and 15% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Mercer County's soil acidic or alkaline?
Mercer County's soil has a pH of 5.5, which is moderately acidic. This range suits many crops and is common across much of the eastern US.
What is the drainage class for Mercer County?
Drainage class data is not currently available for Mercer County.
What crops or plants grow well in Mercer County's soil?
Based on Mercer County's Loam texture, pH of 5.5, 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 Mercer County?
The dominant USDA soil order for Mercer County is not currently available in our dataset.
Soil & Planting Advisory: Mercer County
Soil Verdict
Mercer County is in USDA hardiness zone 6a, a moderate climate zone. where winter lows can reach -10°F. Freeze-thaw cycles are moderate; soil biology slows in winter but recovers reliably in spring, supporting a broad range of plants.
Planting Guidance
A wide plant palette is possible: deciduous trees, most shrubs, cool-season vegetables, and many perennials thrive here. Winter protection (mulch, burlap wraps) helps push the zone boundary for desired species. 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
Moderate freeze-thaw cycles naturally aerate the soil but can also cause compaction in clay-heavy areas; annual core aeration is beneficial. Organic matter amendments decompose at a moderate pace — aim for 3-5% organic content for optimal fertility. When soil temperatures drop below freezing, microbial nitrogen cycling stops; spring fertilization is more effective than late-fall application.
Regional Context
Mercer County closely matches the Pennsylvania average hardiness conditions.
Planning your lawn? View lawn care data for Mercer 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.