Los Angeles County Soil Data
Los Angeles County, California
USDA SSURGO / PHZMAvg pH
N/A
Texture
Unknown
Drainage
N/A
Organic Matter
N/A
Hydrologic Group
N/A
Data Story
About Soil in Los Angeles County, California
Complex Urban Soil Varieties
Comprehensive county-wide soil pH and taxonomic data are currently unavailable for this diverse urban and coastal landscape. Los Angeles likely fluctuates around the state average pH of 6.34 depending on proximity to the mountains or coast. Local testing is essential for navigating these varied micro-climates.
Varied Textures Across the Basin
Data on the specific percentages of sand, silt, and clay is limited for the broader county area. In urban settings, composition can change dramatically from one neighborhood to the next. Understanding your local mix is key to determining how quickly your yard drains after a storm.
Targeting the State Average Fertility
Specific organic matter levels for Los Angeles are not yet recorded in this dataset. For reference, California averages 3.30% organic matter and 0.141 in/in for water capacity. Urban soils often benefit from added organic material to improve growing potential.
Managing Runoff in an Urban Environment
Dominant drainage and hydrologic group data are unavailable, though paved surfaces significantly impact local hydrology. Gardeners should prioritize permeable surfaces to assist with natural groundwater recharge. Observing your property’s response to irrigation will reveal its unique drainage characteristics.
Subtropical Potential in Zone 10b
Located in USDA Hardiness Zone 10b, Los Angeles supports year-round gardening of citrus, avocados, and succulents. The mild winters allow for a vast array of exotic and native plants to flourish. Start your Mediterranean-style garden today to enjoy a perpetual harvest.
Soil Composition
Composition data not available for this county.
Soil pH
pH data not available for this county.
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: Unknown
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 Los Angeles County have?
Los Angeles County's soil is classified as Unknown. This indicates the relative proportions of sand, silt, and clay — sand percentage unavailable, silt percentage unavailable, and clay percentage unavailable. Sandy soils drain quickly but may need more frequent irrigation and fertilization.
Is Los Angeles County's soil acidic or alkaline?
pH data is not available for Los Angeles County.
What is the drainage class for Los Angeles County?
Drainage class data is not currently available for Los Angeles County.
What crops or plants grow well in Los Angeles County's soil?
Based on Los Angeles County's Unknown texture, soil pH, and drainage class, the soil is well suited for a variety of crops depending on local conditions.
What USDA soil order is found in Los Angeles County?
The dominant USDA soil order for Los Angeles County is not currently available in our dataset.
Soil & Planting Advisory: Los Angeles County
Soil Verdict
Los Angeles County is in USDA hardiness zone 10b, a very warm climate zone. where winter lows can reach 35°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
Los Angeles County is somewhat warmer than the California statewide average. The zone range of 7b-11a within the county means soil and planting decisions should account for local elevation and topography.
Planning your lawn? View lawn care data for Los Angeles 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.