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Soil and Plant Testing Laboratories in California: A Complete List

Soil and Plant Testing Laboratories in California: A Complete List

Southern/Central California

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  • A&L Laboratory

    • Phone: 209.529.4080
    • Address: 1010 Carver Road, Modesto, CA 95350
    • Services: Plant, soils, compost nutrient testing; no diagnostics

  • Agbiolab, Inc.

    • Phone: 530.924.4789
    • Address: 2692 House Ave, Durham, CA 95938
    • Services: Plant disease diagnostics, genetic identification

  • AGQ Labs USA

    • Phone: 805.981.2972
    • Address: 2451 Eastman Ave Suite #1, Oxnard CA 93030
    • Services: Soil/water/plant analysis, food safety testing

  • ATS Laboratories (Ag Tech Serv)

    • Phone: 619.344.2532
    • Address: 106 So.8th St., Brawley, CA 92227
    • Services: Soil, plant, water NPK tissue analyses

  • Agri Service (Mary Matava)

    • Phone: 619.727.5451
    • Address: 2142 "B" Industrial Ct., Vista, CA 92083
    • Services: Test citrus and avocado for Phytophthora

  • Associated Labs (Ed Behare)

    • Phone: 714.771.6900
    • Address: 806 N.Batavia, Orange, CA 92668
    • Services: Plant & soil tests, incl. NPK, heavy metals, ag. suitability

  • Butler's Mill Lab

    • Phone: 619.263.6181
    • Address: 5180 Naranja St., P.O.Box 740069, San Diego, CA
    • Services: Soil NPK testing

  • Crop Doctor Lab (Heather Vallier)

    • Phone: 805.962.0505 or 805.927.7707
    • Address: 2751 Ernest Place, Cambria, CA 93428
    • Services: Turf, ornamentals, trees, veg. crops diagnostics

  • Dellavalle Laboratory, Inc.

    • Phone: 559.233.6129
    • Address: 1910 West McKinley Suite 110, Fresno, CA 93728-1298
    • Services: Plant nutrition and salinity testing of soil, plant material, waters, manures and soil amendments, consultation is available, able to broker samples to other labs to meet most clients' needs

  • Eurofins STA Laboratories, Inc.

    • Phone: 408.846.9964
    • Address: 7240 Holsclaw Rd., Gilroy, CA 95020
    • Services: Seed health, seed analysis, grapevine testing, molecular markers, IEF hybrid purity, BIOREBA AG products, resistance screening

  • Fallbrook Ag Lab Inc. (Carolyn Wells)

    • Phone: 619.728.4828
    • Address: 433 S. Main St., Fallbrook, CA 92028
    • Services: Ornamental plant diagnostics

  • Fruit Growers Lab, Inc.-FGL

    • Phone: 805.659.0910
    • Address: P.O. Box 272, Santa Paula, CA 93060
    • Services: Soil, tissue & compost testing; Phytophthora, nematodes

  • Gary King, Horticultural Consultant

    • Phone: 619.941.7409
    • Address: 1321 Hodges Rd., Oceanside, CA 92056
    • Services: Agricultural & horticultural crop diagnostics

  • Orange County Dept. of Agriculture (Richard Tiffer)

    • Phone: 714.447.7100
    • Address: 1010 S. Harbor Blvd., Anaheim, CA 92805
    • Services: Plant disease diagnostics

  • PACE Turfgrass Research (Larry Stowell)

    • Phone: 619.272.9897
    • Address: 1267 Diamond St., San Diego, CA 92109
    • Services: Turf diagnostics

  • Pacific Plant Health (Don Ferrin)

    • Phone: 909.342.0224
    • Address: 1485 Spruce St., Suite D, Riverside, CA 92507
    • Services: Plant disease diagnostics

  • Perry Laboratory

    • Phone: 408.722.7606
    • Address: 471 Airport Blvd., Watsonville, CA 95076
    • Services: Horticultural advising & testing

  • Plant Disease Diagnosis (Louellen Pierce)

    • Phone: 510.937.3841
    • Address: 780 Palmer Rd., Walnut Creek, CA 94596
    • Services: Turfgrass and plant disease diagnostics

  • Primus Group, Inc.

    • Phone: 805.922.0055
    • Address: 3130 Skyway Dr., Suite 308, Santa Maria, CA 93455
    • Services: Pesticide residues, microbes, plant tissues, soil and water

  • San Bernardino County Dept. of Agriculture (Rod Lampman)

    • Phone: 909.387.2123
    • Address: 777 E. Rialto Ave., San Bernardino, CA 92415
    • Services: Plant disease diagnostics

  • San Diego County Dept. of Agriculture (Pat Nolan)

    • Phone: 619.694.2753
    • Address: 5555 Overland Ave. Bldg. #3, San Diego, CA 92123
    • Services: Plant disease diagnostics

  • Soil and Plant Laboratory, Inc.

    • Phone: 714.282.8777
    • Address: 1594 North Main St., Orange, CA 92867
    • Services: Diagnostics, soil, plant nutrient analyses

  • Tree Associates (John Lichter)

    • Phone: 916.795.1517
    • Address: 3963 Central Lane, Winters, CA 95694
    • Services: Tree and landscape problem diagnostics (Northern Sacramento Valley)

  • Wallace Laboratories

    • Phone: 800.473.3699
    • Address: 365 Coral Circle, El Segundo, CA 92045
    • Services: Plant, soil, compost analyses, no diagnostics

Northern/Central California

 

  • A & L Western Agricultural Labs

    • Address: 1311 Woodland Ave., Suite 1, Modesto, CA 95351
    • Phone: (209) 529-4080
    • Fax: (209) 529-4736
    • Website: www.al-labs-west.com

  • Agri-Analysis LLC

    • Address: 950 West Chiles Road, Davis, CA 95618
    • Phone: (800) 506-9852
    • Fax: (530) 757-4655
    • Website: www.agri-analysis.com

  • AL & L Crop Solutions Inc

    • Address: 7769 N. Meridian Rd., Vacaville, CA 95688
    • Phone: (530) 387-3270
    • Fax: (707) 693-3050
    • Website: www.allcropsolutions.com

  • ALC Consolidated

    • Address: 2255 South Broadway, Suite 12, Santa Maria, CA 93454
    • Phone: (805) 739-5333
    • Fax: (805) 739-5522
    • Website: www.aglaboratory.com

  • Basic Lab

    • Address: 3860 Morrow Lane, Suite F, Chico, CA 95928
    • Phone: (530) 894-8966
    • Fax: (530) 894-5143
    • Website: www.basiclab.com

  • Basic Lab

    • Address: 2218 Railroad Ave, Redding, CA 96001
    • Phone: (530) 243-7234
    • Fax: (530) 243-7974
    • Website: www.basiclab.com

  • California Laboratory Services

    • Address: 3249 Fitzgerald Rd, Rancho Cordova, CA 95742
    • Phone: (800) 638-7301
    • Website: www.californialab.com

  • Control Laboratories

    • Address: 42 Hangar Way, Watsonville, CA 95076
    • Phone: (831) 724-5422
    • Fax: (831) 724-3188
    • Website: www.controllabs.com

  • Crop Doctor Laboratory

    • Address: 1375 E Grand Ave Ste 103-133, Arroyo Grande, CA 93420
    • Phone: (805) 927-7707
    • Website: www.cropdoctor.net

  • CSP Lab (California Seed & Plant)

    • Address: 3556 Sankey Rd, Pleasant Grove, CA 95668
    • Phone: (916) 655-1581
    • Fax: (916) 655-1582
    • Website: www.csplabs.com

  • D & D Agricultural Laboratory, Inc

    • Address: 5750 E. Shields Ave., Suite 104, Fresno, CA 93727
    • Phone: (559) 348-1818
    • Fax: (559) 348-1208

  • Dellavalle Laboratory, Inc.

    • Address: 1910 W. McKinley, Suite 110, Fresno, CA 93728
    • Phone: (800) 228-9896
    • Fax: (559) 268-8174
    • Website: www.dellavallelab.com

  • Denele Analytical, Inc.

    • Address: 40 N. East St, Ste B, Woodland, CA 95776
    • Phone: (530) 666-9056
    • Fax: (530) 666-9058
    • Website: www.denelelabs.com

  • Denele Analytical, Inc.

    • Address: 965 S. Kilroy Rd, Turlock, CA 95380
    • Phone: (209) 634-9055
    • Fax: (209) 634-9057
    • Website: www.denelelabs.com

  • Environmental Technical Services

    • Address: 975 Transport Way, Suite 2, Petaluma, CA 94954
    • Phone: (707) 778-9605
    • Fax: (707) 778-9612 (Please call)

  • Fruit Growers Laboratory, Inc.

    • Address: 563 East Lindo Ave, Chico, CA 95926
    • Phone: (530) 343-5818
    • Fax: (530) 343-3807
    • Website: www.fglinc.com

  • Fruit Growers Laboratory, Inc.

    • Address: 2500 Stagecoach Road, Stockton, CA 95215
    • Phone: (209) 942-0182
    • Fax: (209) 942-0423
    • Website: www.fglinc.com

  • Fruit Growers Laboratory, Inc.

    • Address: 9415 W. Goshen Avenue, Visalia, CA 93291
    • Phone: (559) 734-9473
    • Fax: (559) 734-8435
    • Website: www.fglinc.com

  • Fruit Growers Laboratory, Inc.

    • Address: 3442 Empresa Drive, Ste D, San Luis Obispo, CA 93401
    • Phone: (805) 783-2940
    • Fax: (805) 783-2912
    • Website: www.fglinc.com

  • IEH EMA Environmental Micro Analysis

    • Address: 460 N. East Street, Woodland, CA 95776
    • Phone: (530) 666-6890
    • Fax: (530) 666-2987
    • Website: www.emalab.com

  • IEH JL Analytical Services, Inc

    • Address: 217 Primo Way, Modesto, CA 95358
    • Phone: (209) 538-8111
    • Website: www.iehinc.com

  • JM Lord, Inc

    • Address: 4184 N. Knoll Dr., Fresno, CA 93722
    • Phone: (559) 268-9755
    • Fax: (559) 486-6504
    • Website: www.jmlordinc.com

  • Nematodes Inc.

    • Address: 1577 W. Front St., Suite B, Selma, CA 93662
    • Phone: (559) 891-9073
    • Fax: (559) 891-9075 (Please call)

  • Perry Laboratory

    • Address: 424 Airport Blvd., Watsonville, CA 95076
    • Phone: (831) 722-7606
    • Fax: (831) 722-5053
    • Website: www.perrylaboratory.com

  • Plant Disease Diagnosis

    • Address: 780 Palmer Road, Walnut Creek, CA 94596
    • Phone: (925) 937-3841
    • Website: www.pdd.biz

  • Precision Agri-Lab

    • Address: 24730 Avenue 13, Madera, CA 93637
    • Phone: (559) 661-6386
    • Fax: (559) 661-6135
    • Website: www.precisionagrilab.com

  • Sunburst Agri Biotech Solutions

  • Sunland Analytical

  • TriCal Diagnostic

  • Valley Tech Agricultural Laboratory Services

    • Address: 2120 South K Street, Tulare, CA 93274
    • Phone: (559) 688-5684
    • Fax: (559) 688-5768
    • Website: www.valleytechaglab.com

  • VPN Laboratory

Click here for a downloadable pdf of all soil testing labs in California.

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Understanding Soil Health

Assessing soil health involves looking at physical, chemical, and biological components.

Soil health is a fundamental concept that underpins the success of agriculture, gardening, and land management practices. It refers to the overall well-being and vitality of the soil ecosystem, encompassing physical, chemical, and biological aspects. Understanding soil health is crucial for maintaining sustainable and productive landscapes while also contributing to environmental conservation.

  1. Physical
    The physical properties of soil play a critical role in its health. These properties include soil texture, structure, compaction, and water-holding capacity. Soil texture refers to the proportions of sand, silt, and clay particles in the soil. A balanced texture allows for adequate water drainage and retention, preventing waterlogging and drought stress. Soil structure influences root penetration, aeration, and nutrient movement. Healthy soil structure promotes a friable and well-drained medium for plant growth.
  2. Chemical
    Soil chemistry directly affects nutrient availability and plant growth. Key chemical factors include soil pH, nutrient content, and the presence of contaminants. Soil pH measures the soil's acidity or alkalinity and profoundly influences nutrient uptake by plants. Nutrient content, including macronutrients like nitrogen, phosphorus, and potassium, must be in balance to support healthy plant growth. Monitoring and maintaining proper nutrient levels through fertilization are essential for maximizing crop yields and preventing nutrient deficiencies.
  3. Biological
    The biological component of soil health pertains to the diverse array of microorganisms, insects, and other organisms that inhabit the soil ecosystem. These organisms play crucial roles in nutrient cycling, organic matter decomposition, and disease suppression. Soil microorganisms break down organic matter, releasing nutrients that are subsequently made available to plants. A rich and diverse soil microbiome contributes to enhanced nutrient availability and plant resilience against diseases.

Our Soil Tests

We provide a range of soil tests from basic chemistry, to texture/infiltration rate, all the way to biology.

Order a Soil Test Kit

Basic Soil Health Test

The Basic Soil Health Test is an excellent starting point for understanding your soil's condition. It offers a comprehensive analysis encompassing pH levels, nutrient content, CEC (Cation Exchange Capacity), salts, and organic matter. This budget-friendly test is ideal for identifying potential soil health issues and establishing a solid foundation for further management.

Full Chemistry Test

Our Full Chemistry Test provides a detailed assessment of your soil's quality, guiding you towards healthy and sustainable soil management practices. Through an extensive analysis, we examine macro and micronutrient levels, pH, CEC, organic matter, and salinity. This comprehensive understanding empowers us to create tailored recommendations for soil amendments and treatments, optimized for the specific plants you intend to cultivate. By optimizing your soil's chemistry, you can expect to foster more robust and vibrant plant growth.

Complete Soil Health Test

Uncover a deeper understanding of your soil's health with the Complete Soil Health Test. This comprehensive analysis goes beyond the basics, measuring nutritional factors and examining soil texture. It covers macro and micronutrients, organic matter, pH, CEC, as well as sand, silt, and clay percentages. Additionally, we assess carbon sequestration levels, providing you with a holistic view of your soil's composition. The personalized recommendations derived from this test empower you to make precise adjustments to enhance your soil's health and productivity.

MWELO Soil Management Report

For those navigating California's MWELO guidelines, our MWELO Soil Management Report is an indispensable resource. This report not only ensures compliance but also promotes sustainable and thriving landscapes. It includes comprehensive data such as soil texture, infiltration rate, pH, total soluble salts, sodium content, and organic matter percentage. With amendment recommendations, optionally tailored to specific plant types, and annual maintenance tips, you'll be equipped to create landscapes that are both aesthetically pleasing and environmentally responsible.

Heavy Metals

The Heavy Metals analysis is a vital tool in assessing potential soil contamination. Given the uncertain history of properties, this analysis identifies the presence of heavy metals that might have accumulated due to past activities or nearby industrial sources. With results available in approximately nine business days, you'll gain insights to ensure the safety and health of your soil.

Soil Food Web

Explore the intricate world beneath the surface with our Soil Food Web analysis. By estimating population sizes of essential trophic groups—bacteria, fungi, protozoa, and nematodes—we unveil the microbiological health of your soil. Additionally, we identify specific organisms within these groups, providing insights into the soil's successional level and overall condition. This analysis is applicable to soil, compost, and compost tea samples, offering a holistic perspective on your soil's biological vitality.

Pesticide Screening

The Pesticide Screening can detect hundreds on common pesticides that may have been applied or drifted from nearby sources.

Herbicide Screening

The Herbicide Screening plays an important role in ensuring the safety of your soil and plants. By detecting the presence of herbicide residues, this test can indicated whether a soil has had history of herbicide applications.

See our other tests.

Regenerative Soil Management Practices

Working with nature to improve soil means implementing practices like cover cropping, mulching, and composting.

Cover Cropping

Cover cropping involves planting specific crops during non-growing seasons to cover and protect the soil. These crops enhance soil structure, prevent erosion, suppress weeds, and provide organic matter when incorporated into the soil. Leguminous cover crops also contribute nitrogen fixation, enriching soil fertility naturally. Cover cropping is a sustainable method that improves soil health and biodiversity.

Mulching

Mulching entails covering the soil surface with organic materials like straw, leaves, or wood chips. Mulch conserves soil moisture, moderates temperature fluctuations, suppresses weeds, and prevents soil erosion. As the mulch breaks down, it contributes organic matter, enriching the soil's structure and fertility. Mulching is an effective and easy way to maintain soil health.

Composting

Composting transforms organic waste into nutrient-rich compost. Incorporating compost into the soil enhances its structure, moisture retention, and fertility. Compost also introduces beneficial microorganisms that aid in nutrient cycling and disease suppression. Composting not only reduces waste but also revitalizes soil, making it an essential component of sustainable gardening.

Water Conservation Techniques

Implementing water-efficient practices such as drip irrigation, rainwater harvesting, and utilizing drought-resistant plants minimizes water use and reduces soil erosion. Conserving water in landscapes maintains soil moisture, supports plant growth, and sustains overall soil health. Water conservation techniques are vital for responsible gardening in arid and water-scarce regions.

If you have any questions feel free to get in touch with the Alluvial Soil Lab team at (831) 216-1367 or at info@alluvialsoillab.com

This page was written with the help of AI.

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