Our Agro segment combines Tessenderlo Group’s activities in the production, sales and marketing of crop nutrients (liquid crop fertilizers and potassium sulfate fertilizers, based on sulfur as well as organic fertilizers), and crop protection products. We have four business units within this segment: Crop Vitality, NovaSource (both part of Tessenderlo Kerley, Inc.), Tessenderlo Kerley International, and Violleau.

Crop Vitality

Crop Vitality provides world-class crop nutrient products and is the world’s leading producer of sulfur-based crop nutrition products used in the agriculture industry. Crop Vitality offers a diverse portfolio of products that are vital to crop health, including Thio-Sul®, KTS®, K-Row 23®, CaTs®, GranuPotasse®, and SoluPotasse®. 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. Crop Vitality is operated by Tessenderlo Kerley, Inc.

Crop Vitality’s product 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 signifies our passion to deliver vital elements for optimal plant and soil health. Our products represent our core competence – sulfur. This vital nutrient emphasizes our commitment to upholding sustainable agricultural practices that use science-based management plans, such as 4R Nutrient Stewardship, in order to minimize environmental impact. Our priority is to improve continually with the aim of realizing the highest quality, environmentally friendly, and sustainable products. Our Crop Vitality Learning Center, located in Dinuba, California (US), performs key research on crop nutrition, and it both develops and tests products to assure optimal plant health. These activities provide valuable insights and resources to crop growers.

Visit the Crop Vitality website


NovaSource delivers a portfolio of niche crop protection products to agriculture customers worldwide. Focusing on specialty crops, NovaSource brings value to the market using active ingredients that are proven to boost crop yields and quality. The team shares over 100 years of knowledge in heat stress, insecticides, herbicides, fungicides and soil amendment with the global agriculture community. This highly educated and experienced group is positioned in specific regions in order to provide growers with expert guidance and product knowledge that is specific to their location. Through a diverse array of superior crop protection products, NovaSource protects growers’ crops from a variety of damaging weeds, insects, diseases, and solar damage, hence increasing the growers’ yields, profitability, and predictability. NovaSource is operated by Tessenderlo Kerley, Inc.

Visit the NovaSource website

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 has an outstanding heritage. This is because we are able to build on the 100 years of expertise at Tessenderlo (in solid and soluble potassium-based fertilizers) and the 70 years of expertise at Kerley (in liquid 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®, 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 matter and in crop protection for agriculture. We not only offer products but also consulting services to optimize the choice of formulas, their application, the yields, and the quality of our customers' productions.

Our fertilizing products, which come in the form of pellets and composts, are applicable to organic and conventional productions for applications in market gardening, vineyards, arboriculture, field crops, or 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, we are now the European distributor of these crop protection products. They are developed by NovaSource, which is part of Tessenderlo Kerley, Inc.

Visit the Violleau website