Pima County Soil Data
Pima County, Arizona
USDA SSURGO / PHZMAvg pH
N/A
Texture
Unknown
Drainage
N/A
Organic Matter
N/A
Hydrologic Group
N/A
Data Story
About Soil in Pima County, Arizona
The Heart of the Sonoran Desert
Pima County represents the heart of the Sonoran Desert, though official soil taxonomy remains partially unmapped. Without a confirmed pH average, residents should anticipate alkaline conditions that contrast with the 6.5 national median. Knowing your soil's specific identity allows for smarter plant selection and treatment.
Decoding Desert Ground
While specific percentages for sand, silt, and clay are not available, the local texture defines the desert experience. These components dictate whether your ground is a hard-packed caliche or a fast-draining wash. Site-specific analysis is required to determine the best approach for soil workability.
Unlocking Growing Potential
Current data does not specify organic matter or water capacity for Pima County's vast acreage. Desert soils typically require significant additions to match the 2.0% national average for organic matter. Building up this fertility is key to unlocking the growing potential of the Tucson basin.
Water Management in the Basin
Official records for drainage classes and hydrologic groups are currently incomplete for this area. Proper drainage management is vital to prevent salt accumulation in your garden's root zone. Observing how water moves across your property during summer monsoons provides the best practical guide.
Abundant Growth in Zone 9a
Pima County falls within Hardiness Zone 9a, offering a nearly year-round growing season for desert-adapted species. Pomegranates and prickly pear thrive in this heat, as do winter crops like kale and carrots. Dig in and embrace the unique rhythms of Sonoran Desert gardening.
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 Pima County have?
Pima 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 Pima County's soil acidic or alkaline?
pH data is not available for Pima County.
What is the drainage class for Pima County?
Drainage class data is not currently available for Pima County.
What crops or plants grow well in Pima County's soil?
Based on Pima 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 Pima County?
The dominant USDA soil order for Pima County is not currently available in our dataset.
Soil & Planting Advisory: Pima County
Soil Verdict
Pima 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
Pima County is somewhat warmer than the Arizona statewide average. 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 Pima County on LawnByCounty.com →
Other Counties in Arizona
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.