Lake County Soil Data
Lake County, California
USDA SSURGO / PHZMAvg pH
6.4
Texture
Loam
Drainage
N/A
Organic Matter
3.1%
Hydrologic Group
D
Data Story
About Soil in Lake County, California
Slightly Acidic Profile in Lake County
Lake County features an average pH of 6.36, which sits slightly more acidic than the national median of 6.5. This pH level is almost identical to the California state average of 6.34. The overall soil score of 52.9 indicates a higher quality than the state benchmark of 48.6.
A Balanced Sand-Heavy Mixture
The soil contains 42.0% sand, 36.1% silt, and 20.9% clay. This high sand content ensures easier workability, while the clay provides enough structure for nutrient retention. It represents a versatile medium for varied agricultural pursuits.
Above National Averages for Organic Matter
Organic matter reaches 3.08%, significantly exceeding the national average of 2.0%. However, the available water capacity of 0.131 in/in falls slightly below the state average of 0.141. These soils offer strong growing potential but may require consistent moisture management.
Slow Infiltration with Hydrologic Group D
Lake County falls into hydrologic group D, which typically suggests high runoff potential and slow infiltration. Gardeners and builders should account for this limited drainage during heavy rainfall events. Strategic landscaping is necessary to prevent water pooling on-site.
Warm-Season Success in Zone 9a
USDA Hardiness Zone 9a supports a wide range of crops like walnuts, pears, and wine grapes. The combination of high organic matter and warm temperatures creates an ideal environment for fruit production. Now is the perfect time to start your home vineyard or orchard.
Soil Composition
Soil pH
Soil Series
Detailed soil series data not yet available for this county.
Hydrologic Group
Group D — High Runoff
Clay soils with very slow infiltration rates. Highest runoff potential. These soils have a permanent high water table or are shallow over impervious material.
Drainage Class
Drainage class data not available.
Soil Profile
Dominant texture: 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 Lake County have?
Lake County's soil is classified as Loam. This indicates the relative proportions of sand, silt, and clay — 42% sand, 36% silt, and 21% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Lake County's soil acidic or alkaline?
Lake 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 Lake County?
Drainage class data is not currently available for Lake County.
What crops or plants grow well in Lake County's soil?
Based on Lake County's 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 Lake County?
The dominant USDA soil order for Lake County is not currently available in our dataset.
Soil & Planting Advisory: Lake County
Soil Verdict
Lake County is in USDA hardiness zone 9a, a warm climate zone. where winter lows can reach 20°F. Warm winters keep soil biology active nearly year-round, accelerating decomposition but increasing pest and disease pressure in topsoil.
Planting Guidance
Tropical and subtropical plants are viable. Year-round gardening is possible, though summer heat may limit some cool-season crops. Frost is rare; tender plants can overwinter with minimal protection. 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
Rapid organic matter turnover means soils can become nutrient-poor quickly; test annually and fertilize based on results. High soil temperatures favor certain soilborne pathogens; practice crop rotation and avoid overwatering.
Regional Context
Lake County closely matches the California average hardiness conditions. The zone range of 8b-9b within the county means soil and planting decisions should account for local elevation and topography.
Planning your lawn? View lawn care data for Lake County on LawnByCounty.com →
Other Counties in California
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.