Jack's Professional 17-5-19 Poinsettia FeED +Mg Water Soluble Fertilizer, 25 lbs.This product is designed to fit the needs of the newer poinsettia cultivars that require micronutrients, but a lesser amount of macronutrients, containing 50% more iron, manganese, copper and zinc than found in typical poinsettia peat lite formulations. Extra Soluble Molybdendum added to the formula to reduce or eliminate the extra step of adding Moly to each stock tank. Low boron levels help prevent toxicity problems. For Use On: Dark leaved