• 1947
    Kerley Brothers founded Southwest Fertilizer & Chemical Co.
  • 1953
    Barney Kerley developed new method of liquid fertilizer production
  • 1959
    Thio-Sul® introduced to farmers
  • 1960
    Kerley Chemical
    focused on
    wholesale manufacturing
  • 1995
    Kerley is purchased by Tessenderlo Chemie
  • 2012
    TKI launched Crop Vitality brand

Leading the agriculture industry

Crop Vitality is the world’s largest and leading producer of sulphur-based liquid plant nutrition products to the agriculture industry. For more than 60 years we have served our customers in nurturing crops through our innovation, research and development of environmentally friendly, sustainable and nutrient-filled fertilizers. Our product line provides the critical elements to improve soil health, increase water percolation and maximize nutrient uptake.

Headquartered in Phoenix, Arizona, our line of products are manufactured at 11 locations throughout the United States, tested by agronomists and used by farmers across the globe. Tessenderlo Kerley, Inc (TKI) offers specialized crop and soil nutrients through Crop Vitality. The Crop Vitality group was formed in 2012 to distinguish TKI’s presence in agribusiness as we create solutions to meet the challenges of modern agriculture.

  • Meet Our People

    Our team is comprised of over 300 employees, dedicated to providing solutions to achieve nutrient rich crops through research and innovation. With more than six decades of experience, we serve as crop certified advisors specializing in crop fertility as well as plant and soil nutrition.

  • Corporate citizenship

    TKI is a proud corporate citizen and neighbor to the communities where we operate. We support industry-specific initiatives such as the Nutrients for Life program sponsored by The Fertilizer Institute and Future Farmers of America.

    Our team also contributes time and financial contributions to causes that make a difference in the communities we work and live such as food banks and other nonprofit organizations.


  • Safety

    The majority of our production facilities have been safely operated for more than 20 years without a single lost time incident. Extensive safety measures and plans are in place at each of our 11 locations to ensure that our workers and the surrounding communities are safe, and that all materials are handled responsibly.


  • Stewardship

    Crop Vitality adheres to the guiding principles of 4R Nutrient Stewardship that provides a framework to achieve cropping system goals such as increased production, increased farmer profitability, enhanced environmental protection and improved sustainability. In addition, Crop Vitality supports the efforts of ResponsibleAg.