Grand County Soil Data
Grand County, Utah
USDA SSURGO / PHZMAvg pH
N/A
Texture
Unknown
Drainage
N/A
Organic Matter
N/A
Hydrologic Group
N/A
Data Story
About Soil in Grand County, Utah
The red rock soil identity
Specific soil taxonomy and pH data for Grand County are not currently mapped at the county level. The area likely mirrors the Utah average pH of 7.71, standing well above the national median of 6.5. These alkaline conditions often define the unique desert ecology found around Moab.
Sand and silt in the desert
Localized percentages for sand, silt, and clay are unavailable, yet desert textures dominate the landscape. These soils often provide rapid drainage but may struggle with nutrient retention without added organic amendments. Knowing your specific texture helps you decide between drip irrigation or deep soaking.
Boosting organic matter in arid lands
Grand County's fertility levels are currently unrecorded, but Utah's state average organic matter sits at a healthy 7.59%. This benchmark is nearly four times higher than the national average of 2.0%. Local growers often add mulch to reach the state’s available water capacity average of 0.138 in/in.
Managing water in unmapped terrain
Standard drainage classes and hydrologic groups are not listed for this county. In this arid climate, understanding how your specific plot handles sudden flash floods is critical for safety. We recommend a percolation test before designing any residential irrigation or drainage system.
Warm-season success in Zone 7a
Grand County enjoys the warmth of USDA Hardiness Zone 7a. This climate is perfect for heat-loving crops like peaches, grapes, and tomatoes if you manage water carefully. Take advantage of the long growing season and plant your desert oasis today.
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 Grand County have?
Grand 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 Grand County's soil acidic or alkaline?
pH data is not available for Grand County.
What is the drainage class for Grand County?
Drainage class data is not currently available for Grand County.
What crops or plants grow well in Grand County's soil?
Based on Grand 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 Grand County?
The dominant USDA soil order for Grand County is not currently available in our dataset.
Soil & Planting Advisory: Grand County
Soil Verdict
Grand County is in USDA hardiness zone 7a, a moderate climate zone. where winter lows can reach 0°F. Mild winters mean soil rarely freezes deeply, allowing year-round microbial activity and faster organic matter breakdown.
Planting Guidance
Warm-season crops, citrus relatives, and heat-loving ornamentals do well. Cool-season vegetables should be planted in fall and winter. 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
Warm soils accelerate organic matter breakdown, so compost and mulch need replenishing more frequently than in cooler zones. Sandy soils common in warm zones drain quickly; water-retentive amendments like compost or peat help hold moisture. When soil temperatures drop below freezing, microbial nitrogen cycling stops; spring fertilization is more effective than late-fall application.
Regional Context
Grand County is somewhat warmer than the Utah statewide average.
Planning your lawn? View lawn care data for Grand County on LawnByCounty.com →
Other Counties in Utah
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.