This rose feed contains a unique combination of 6 natural elements: Mile-Hi Kelp Meal, alfalfa meal, meat and bone meal, blood meal, fish meal and cottonseed meal. Primary elements used are nitrogen, phosphorus and potash, with secondary elements calcium, magnesium and sulfur, and trace elements iron, zinc, manganese, copper, boron, and molybdenum. Nutrients release slowly into the soil benefiting roots over months and even years.