Logan County Soil Data
Logan County, Ohio
USDA SSURGO / PHZMAvg pH
6.1
Texture
Silt loam
Drainage
Well drained
Organic Matter
6.9%
Hydrologic Group
C
Data Story
About Soil in Logan County, Ohio
High-scoring Alfisols in Logan
Logan County boasts a high soil score of 81.1, driven by its nutrient-rich Alfisols. The average pH of 6.09 is among the highest in the state, nearing the national median of 6.5. This favorable chemistry means less work for gardeners and farmers to get their soil ready for planting.
Heavy silt loam with clay strength
The soil is a silt loam consisting of 50.0% silt and 22.1% clay, the highest clay percentage among its neighbors. This clay content provides excellent structure and nutrient-holding capacity. While it may be slightly heavier to till, the trade-off is a much more resilient growing medium.
Top-tier water capacity and organic richness
Logan County excels in fertility with an available water capacity of 0.211 in/in, far surpassing the state average of 0.186. Combined with 6.88% organic matter—significantly higher than the state's 4.85%—this soil is a powerhouse. It effectively captures and stores both rain and nutrients for plant use.
Well-drained and productive ground
Classified as well drained and Hydrologic Group C, these soils move water efficiently while maintaining necessary moisture levels. This makes Logan County particularly suitable for a wide range of uses, from intensive farming to residential construction. You won't often find standing water issues in these well-structured soils.
Thriving in the 6a Heartland
Logan County's 6a zone and superior soil quality make it ideal for high-yield vegetable gardens and lush lawns. The high available water capacity is perfect for thirsty crops like tomatoes, cucumbers, and melons. This is some of the best soil in Ohio—get outside and take advantage of it.
Soil Composition
Soil pH
Soil Series
Detailed soil series data not yet available for this county.
Hydrologic Group
Group C — Moderate-High Runoff
Soils with slow infiltration rates, often with a layer that impedes downward water movement. Higher clay content restricts drainage.
Drainage Class
Well drained
Water is removed from the soil readily but not rapidly. Optimal for most plants and construction.
Soil Profile
Dominant texture: Silt 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 Logan County have?
Logan County's soil is classified as Silt loam. This indicates the relative proportions of sand, silt, and clay — 22% sand, 50% silt, and 22% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Logan County's soil acidic or alkaline?
Logan County's soil has a pH of 6.1, which is moderately acidic. This range suits many crops and is common across much of the eastern US.
What is the drainage class for Logan County?
Logan County has a dominant drainage class of "Well drained." Well-drained soils allow excess water to move through quickly, reducing waterlogging risk and supporting most field and garden crops.
What crops or plants grow well in Logan County's soil?
Based on Logan County's Silt loam texture, pH of 6.1, and Well drained, the soil is well suited for vegetables, grains, and most field crops, row crops and vegetable gardens, most annual and perennial crops.
What USDA soil order is found in Logan County?
Logan County's dominant soil order is Alfisols. Alfisols are moderate to high base-status soils with a clay-enriched subsoil. They support productive forests and cropland across temperate regions.
Soil & Planting Advisory: Logan County
Soil Verdict
Logan 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
Logan County closely matches the Ohio average hardiness conditions.
Planning your lawn? View lawn care data for Logan County on LawnByCounty.com →
Other Counties in Ohio
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.