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If you are a nitrogen-based fertilizer user, this is your opportunity to reduce your fertilizer costs and ensure a reliable supply of fertilizer through a grower-owned cooperative! We invite you to become a part of the CALAMCO success story by investing in your future with a company that has proven itself to be a winner!

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CALAMCO is a California-based cooperative made up of approximately 1200 grower-members from throughout California, as well as fertilizer dealers and our industry partner, the J. R. Simplot Company. Since its inception in 1957, CALAMCO shareholders have been enjoying the benefits their stock has entitled them.

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After founding The Best Fertilizers Co. in 1932, Lowell W. Berry had a vision to form California Ammonia Co. (CALAMCO) – a joint venture involving The Best Fertilizers Co. and a group of California farmers. CALAMCO was incorporated in 1957 for the principal purpose of manufacturing and selling...

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