Arizona Extension & Soil Testing Directory
Find your local Arizona County Cooperative Extension office, official state university soil analysis lab, and Master Gardener volunteer plant clinics.
🔬 State Soil Testing Laboratory
Official Lab: UA Certified Environmental Soil Laboratory Partner
Standard Fee: $25 desert salinity & pH sample kit
Turnaround Time: 7 to 10 business days
State residents can obtain soil sample bags and submittal forms at any local county extension branch.
🌱 State Growing Conditions
Soil Types: Alkaline Sonoran Desert Caliche & Clay (pH 7.8 - 8.5)
Hardiness Zones: Zone 8b / 10a
Popular Crops: Citrus, dates, figs, peppers, desert legumes, bermudagrass
Do not add lime to Arizona desert soils. Incorporate elemental sulfur and compost to flush out excessive salts.
Featured County Directories in Arizona (15 Listings)
Apache County
Extension Office: University of Arizona Extension - Apache County
Soil Lab Fee: $25 desert salinity & pH sample kit
Phone: (040) 555-0199
Cochise County
Extension Office: University of Arizona Extension - Cochise County
Soil Lab Fee: $25 desert salinity & pH sample kit
Phone: (040) 555-0199
Coconino County
Extension Office: University of Arizona Extension - Coconino County
Soil Lab Fee: $25 desert salinity & pH sample kit
Phone: (040) 555-0199
Gila County
Extension Office: University of Arizona Extension - Gila County
Soil Lab Fee: $25 desert salinity & pH sample kit
Phone: (040) 555-0199
Graham County
Extension Office: University of Arizona Extension - Graham County
Soil Lab Fee: $25 desert salinity & pH sample kit
Phone: (040) 555-0199
Greenlee County
Extension Office: University of Arizona Extension - Greenlee County
Soil Lab Fee: $25 desert salinity & pH sample kit
Phone: (040) 555-0199
La Paz County
Extension Office: University of Arizona Extension - La Paz County
Soil Lab Fee: $25 desert salinity & pH sample kit
Phone: (040) 555-0199
Maricopa County
Extension Office: University of Arizona Extension - Maricopa County
Soil Lab Fee: $25 desert salinity & pH sample kit
Phone: (040) 555-0199
Mohave County
Extension Office: University of Arizona Extension - Mohave County
Soil Lab Fee: $25 desert salinity & pH sample kit
Phone: (040) 555-0199
Navajo County
Extension Office: University of Arizona Extension - Navajo County
Soil Lab Fee: $25 desert salinity & pH sample kit
Phone: (040) 555-0199
Pima County
Extension Office: University of Arizona Extension - Pima County
Soil Lab Fee: $25 desert salinity & pH sample kit
Phone: (040) 555-0199
Pinal County
Extension Office: University of Arizona Extension - Pinal County
Soil Lab Fee: $25 desert salinity & pH sample kit
Phone: (040) 555-0199
Santa Cruz County
Extension Office: University of Arizona Extension - Santa Cruz County
Soil Lab Fee: $25 desert salinity & pH sample kit
Phone: (040) 555-0199
Yavapai County
Extension Office: University of Arizona Extension - Yavapai County
Soil Lab Fee: $25 desert salinity & pH sample kit
Phone: (040) 555-0199
Yuma County
Extension Office: University of Arizona Extension - Yuma County
Soil Lab Fee: $25 desert salinity & pH sample kit
Phone: (040) 555-0199
📦 Recommended Mail-In Soil Test Kits & Meters
FTC Affiliate Disclosure: We may earn a commissionIf you need immediate results without waiting for university mail-in lab turnaround times, these top-rated professional home soil test kits provide fast pH, N, P, and K diagnostic analysis:
MySoil Soil Test Kit
Professional mail-in kit analyzed by accredited labs. Returns 13 essential nutrient values (N, P, K, pH, Micronutrients) & customized fertilizer recommendations via app.
Luster Leaf Rapitest 1601
Popular color-comparator kit for 10 instant soil tests (pH, Nitrogen, Phosphorus, Potash). Includes tailored plant preference chart.
Sonkir 3-in-1 Soil Tester
Instant probe sensor for soil moisture, pH, and sunlight levels. Requires no batteries. Perfect for potted plants, lawns, and raised beds.
📋 Request Local Extension & Lawn Testing Assistance in Arizona Statewide
Need help interpreting your lab results or finding local agricultural extension agents? Fill out the brief form below:
Frequently Asked Questions: Arizona Soil & Extension
How do I get my soil tested in Arizona?
To test your soil in Arizona, collect 10 to 12 soil cores from a depth of 4 to 6 inches across your garden or field, air-dry the sample indoors, fill out your county extension submission form, and submit it to UA Certified Environmental Soil Laboratory Partner or your local county extension office.
How much does soil testing cost in Arizona?
Routine soil fertility analysis in Arizona typically costs $25 desert salinity & pH sample kit. Turnaround time for results is usually 7 to 10 business days.
Does every county in Arizona have a Cooperative Extension Office?
Yes. Every county in Arizona is served by the state's Land-Grant University Extension system. While our directory highlights primary regional office hubs and university labs, local extension agents serve horticulturists, farmers, and home gardeners across all counties in Arizona.
Written & Verified by Sahajul
Verified Author & Founder
Sahajul is an independent agricultural data researcher based in India and founder of LocalSoilLab.com. He specializes in compiling, structuring, and verifying US land-grant university extension services, soil lab testing fee schedules, and county Master Gardener contact directories directly from official .edu and USDA NIFA portals.