Rosier SA manufactures and sells mineral fertilizers in Belgium and the Netherlands. It offers granular fertilizers; and water-soluble and liquid fertilizers. The company was formerly known as S.A. Engrais Rosier and changed its name to Rosier SA in 2001. Rosier SA was founded in 1880 and is based in Frasnes-lez-Anvaing, Belgium. Rosier S.A. is a subsidiary of Borealis AG.