This formula has been specifically developed to feed plants requiring an acid-based fertilizer. Package contains three individual, one-pound sleeves inside a plastic bucket. It is high in nitrogen and contains micronutrients such as iron, copper, boron, manganese, molybdenum, and zinc to supply the secondary nutrients important for proper nutrition. It is for use on many plants such as azalea, holly, gardenia, dogwood, hydrangea, all evergreens, rhododendron, orchid, ferns and many others. The formula is quickly available to the plant. It is absorbed through the foliage (approximately 10%) and through the root system to maintain and promote overall plant vigor and good health.