Miami County Soil Data
Miami County, Ohio
USDA SSURGO / PHZMAvg pH
6.4
Texture
Silt Loam
Drainage
N/A
Organic Matter
3.6%
Hydrologic Group
N/A
Data Story
About Soil in Miami County, Ohio
Near-Perfect pH for Versatile Growing
Miami County boasts a pH of 6.44, almost perfectly matching the national median of 6.5. This puts it far ahead of the state average of 5.97 in terms of nutrient availability. It is one of the most chemically balanced soils in the state for general agricultural use.
Silty Texture with Moderate Sand
The soil consists of 50.1% silt and 25.8% sand, rounded out by 21.9% clay. This balanced texture allows for decent drainage while still maintaining enough body to support plant roots. It is a versatile mix that responds well to traditional farming techniques.
Consistent Water Storage for Crops
The available water capacity is 0.186 in/in, which exactly matches the Ohio state average. While organic matter is lower than the state average at 3.63%, the excellent pH level helps compensate for lower organic levels. This soil provides a reliable and steady foundation for seasonal growth.
A Blank Slate for Hydrology
Official drainage classifications are not currently available for Miami County's regional data. Given its balanced composition, the soil likely exhibits moderate drainage characteristics suitable for many uses. Local residents should observe how their land handles heavy rain to determine if extra drainage is needed.
Growing Confidence in Zone 6a
Zone 6a weather paired with an ideal pH makes this an excellent spot for everything from fruit trees to vegetable rows. Because the pH is so balanced, most garden favorites will thrive without the need for expensive chemical adjustments. Start your seeds early and enjoy a productive harvest.
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: 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 Miami County have?
Miami County's soil is classified as Silt Loam. This indicates the relative proportions of sand, silt, and clay — 26% sand, 50% silt, and 22% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Miami County's soil acidic or alkaline?
Miami County's soil has a pH of 6.4, which is moderately acidic. This range suits many crops and is common across much of the eastern US.
What is the drainage class for Miami County?
Drainage class data is not currently available for Miami County.
What crops or plants grow well in Miami County's soil?
Based on Miami County's Silt Loam texture, pH of 6.4, 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 Miami County?
The dominant USDA soil order for Miami County is not currently available in our dataset.
Soil & Planting Advisory: Miami County
Soil Verdict
Miami 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
Miami County closely matches the Ohio average hardiness conditions.
Planning your lawn? View lawn care data for Miami 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.