Our Agro segment combines Tessenderlo Group’s activities in the production, sales and marketing of crop nutrients and crop protection products. We have four business units within this segment: Crop Vitality, NovaSource, Tessenderlo Kerley International, and Violleau.

Crop Vitality

Crop Vitality is one of the world’s leading producers of sulfur-based fertilizers used in the agriculture industry for crop nutrition. Crop Vitality offers a diverse portfolio of Tessenderlo Kerley fertilizers that are vital to crop health, including Thio-Sul®, KTS®, K-Row 23®, CaTs®, N-Sure®, GranuPotasse®, SoluPotasse®, and MAJOR 90®. Our experienced team of agronomic experts and our comprehensive network of production and distribution facilities make us a preferred partner in the US and Canadian markets. Our portfolio exemplifies how we help to nurture crop health by providing the essential nutrients that plants require. “Nurturing Crop Life” is not just our tagline; it also signifies our passion to deliver vital elements for optimal plant and soil health. Our fertilizers represent our core – sulfur. This vital nutrient emphasizes our commitment to upholding sustainable agricultural practices that use science-based management plans to help reduce the potential for environmental impact. For example, the applications of Thio-Sul® and KTS® for nitrification inhibition and CaTs® for water efficiency enable nutrients to get to the roots and eliminate nutrient loss. Our Innovation and Learning Center, which is located in Dinuba, California (USA), performs key research on crop nutrition and develops and tests products to promote optimal plant health. These initiatives provide invaluable insights and resources to growers.

Visit the Crop Vitality website


NovaSource delivers a portfolio of organic and non-organic niche crop protection products to agriculture customers worldwide. Focusing on specialty crops, NovaSource addresses growers’ concerns regarding pests, weeds, diseases, and solar damage, which can diminish crop yields and impact food supply. By utilizing science-based crop protection products that are proven to overcome these challenges, growers can boost their crop yields and quality. Our experienced team is positioned to provide stewardship to growers with guidance and product knowledge specific to their locations. Our knowledge of heat stress protection, insecticides, herbicides, fungicides, and soil amendments enables the global agriculture community to make available farmland more effective.

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Tessenderlo Kerley International

Tessenderlo Kerley International supplies value-added liquid, soluble, and solid plant nutrition to support growers in realizing efficient and sustainable agriculture. Our global team of agronomists and commercial advisers is characterized by a dense local network, strong customer focus, and an outstanding heritage. This is because we are able to build on the more than 100 years of expertise at Tessenderlo (in solid and soluble potassium-based fertilizers) and the more than 70 years of expertise at Kerley (in liquid sulfur-based fertilizers). Our dedication to giving farmers the precise tools needed to optimize their crops is at the very heart of everything we do. Our portfolio consists of well-recognized specialty fertilizers such as SoluPotasse®, SoluKem®, Thio-Sul®, KTS®, CaTs®, etc., and we continuously invest in these products in terms of innovation, product development, and support. This is how we can guarantee that all of our interactions – whether they involve our products, our experts, or our advisers – will create maximal output, i.e. a better yield for crops, more control for farmers, and a healthier planet for everyone.

Visit the Tessenderlo Kerley International website


Violleau specializes in the production of organic soil improvers and fertilizers formulated on the basis of animal and plant materials and in biocontrol products for agriculture. We not only offer products but also advisory services to optimize the choice of formulas, their application, the yields, and the quality of our customers’ productions. Our fertilizing products, which mainly come in the form of pellets, are applicable to organic and conventional productions for applications in market gardening, vineyards, arboriculture, field crops, and green spaces.

Their quality is controlled at the level of raw materials, finished products, and the supply chain. Our expertise covers all the flows in Europe, from upstream to downstream: the selection and collection of materials, the elaboration of composts and pellets in France, and the transport and delivery to our customers. In addition to the existing fertilizer activities, in 2022, we integrated the marketing of the biocontrol products, Surround® and Purshade®, confirming our ambition to further grow in the organic farming market.

Visit the Violleau website