Ultrasol® SOP is a source of potassium (K) and sulfur (S) totally soluble in water and in crystalline form. It is applied in fertigation of soil-grown crops during the ripening or high potassium demand phase, where nitrogen requirements are minimal, providing part of the potassium without nitrogen. In hydroponic systems, Ultrasol® SOP is mainly applied as a sulfur source for crops requiring high amounts of sulfur. It comes in crystalline powder form and is compatible with all water-soluble fertilizers, except those containing calcium.
