Kalibrateis a chloride- and hydroxide-free potassium solution that contains sulfur. It can be used in combination with Pro-Germinator® and other AgroLiquid products to provide a complete fertilizer program. Kalibrateis specially formulated to resist freezing and comes back into solution without heat or agitation even when freezing has occured, making it well- suited for fall and early-season delivery in northern climates.