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ThermoPotash is a slow-release, multi-nutrient fertilizer product made from a silicate-based potash resource. It contains on average 4%-14% K2O. It is derived by performing a pyrometallurgical process on Verdete (green) slate rock and limestone.[1]

ThermoPotash is being developed as an alternative to current potash sources, such as potassium chloride (KCl)[2] and potassium sulfate (K2SO4).