Miracle-Gro Slow Release Rose & Shrub Food is slow release so one application will feed plants up to 6 months, removing the need for regular feeding. Miracle-Gro Slow Release Rose & Shrub Food uses a patented technology used by professional growers. Contains all the required nutrients for strong healthy plants. Use Miracle-Gro Slow Release Rose & Shrub Food between February and June. Miracle-Gro Slow Release Rose & Shrub Food 1kg shaker jar feeds up to 40 bushes.