Miracle-Gro® Premium Rose & Shrub Continuous Release Plant Food is a ‘smart’ feed. It has a special fast acting and long lasting formula. Each granule has a coating that controls and regulates the release of nutrients, only releasing them when conditions are right for plant growth and when the plant needs them. This release ensures steady, even growth – which is far better for producing strong, sturdy, healthy plants that perform much better in the garden.