Monterey County Soil Data
Monterey County, California
USDA SSURGO / PHZMAvg pH
6.6
Texture
Loam
Drainage
N/A
Organic Matter
2.5%
Hydrologic Group
D
Data Story
About Soil in Monterey County, California
The Slightly Alkaline Coastal Ground
Monterey County features a soil pH of 6.64, which is slightly higher than the national median of 6.5. This chemical profile provides a stable foundation for the region's diverse and productive agricultural industry. While the taxonomic order is not recorded here, the soil remains a cornerstone of the local economy.
A Sandy Foundation for Growth
The soil contains 45.8% sand, 30.5% silt, and 21.9% clay. This sand-heavy mixture ensures rapid drainage but can make nutrient retention more challenging for local growers. Consistent organic amendments are often used to balance this texture for better farming results.
Fertility in the Salad Bowl
Organic matter in Monterey averages 2.50%, falling below the California state average of 3.30%. However, the available water capacity matches the state benchmark exactly at 0.141 in/in. This combination supports the intensive vegetable production that makes the region famous.
Managing High Runoff Potential
Belonging to hydrologic group D, Monterey's soil typically exhibits a high runoff potential when wet. This characteristic requires careful land management to prevent erosion and ensure water penetrates the root zone. Precise irrigation strategies are essential for both large farms and home gardens.
Thriving in Hardiness Zone 9b
Monterey's 9b zone is a premier environment for cool-season crops like artichokes and strawberries. The coastal climate and reliable water capacity create an ideal setting for year-round cultivation. Now is the perfect time to start a garden and enjoy the bounty of this rich agricultural heritage.
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 Monterey County have?
Monterey County's soil is classified as Loam. This indicates the relative proportions of sand, silt, and clay — 46% sand, 30% silt, and 22% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Monterey County's soil acidic or alkaline?
Monterey County's soil has a pH of 6.6, which is near neutral. This range is ideal for most garden plants and field crops.
What is the drainage class for Monterey County?
Drainage class data is not currently available for Monterey County.
What crops or plants grow well in Monterey County's soil?
Based on Monterey County's Loam texture, pH of 6.6, 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 Monterey County?
The dominant USDA soil order for Monterey County is not currently available in our dataset.
Soil & Planting Advisory: Monterey County
Soil Verdict
Monterey County is in USDA hardiness zone 9b, a warm climate zone. where winter lows can reach 25°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
Monterey County closely matches the California average hardiness conditions. The zone range of 8b-10b within the county means soil and planting decisions should account for local elevation and topography.
Planning your lawn? View lawn care data for Monterey 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.