Every 6 weeks throughout the growing season.
Roses, flowers, iris, hibiscus, azaleas, camellias, rhododendrons and other shrubs.
Roses: 1/2 cup (4.5 ounces) evenly over an area 3 feet x 3 feet (9 square feet).
Flowers: approximately 2/3 pounds per each 25 square feet (5 feet x 5 feet) of bed area.
Established Plants & Ornamental Shrubs: 2/3 cup (6 ounces) for each foot of shrub height (2 cups for 3 feet high shrub).