Formulation: Iron Sulphate Recommended for the prevention and correction of plant chlorosis (yellowing of plant leaves) caused by iron deficiency. Aids in creating an acid soil condition. Application Rates: Trees: 1/2 lb. per inch of trunk. Apply around drip line. Shrubs: 1 lb. per 2 ft. of height. Caution: Will stain concrete and pavement. ITEM NO: 13802254 MODEL: 32156 SIZE: 15 Lb. UPC: 732221-321564 VL: UM: EA PK: 4