Jobe’s Slow Release Tree and Shrub Fertilizer Spikes, Easy Plant Care for Oak, M
Jobe’s Slow Release Tree and Shrub Fertilizer Spikes, Easy Plant Care for Oak, Maple, Dogwood, Boxwood, and Many More Acid Loving Trees and Shrubs, 5 Count. - Application is simple and should be done twice a year in early spring and late fall.