Fully soluble, plant derived fertilizer designed to supply 20% potash in a high plant available form. Unique Ferticell® manufacturing produces a Potassium with little to no sulfur content. Light and frequent foliar or drip applications will reduce deficiencies that can cause crop damage. Potassium, the third most used nutrient in plants, Pro K™ 0-0-20 plays important roles in plant functions such as regulating the opening and closing stomata, activating enzymes, balancing ions, translocating sugars, and osmosis. balancing ions, translocating sugars, and osmosis.