Miracle-Gro® Shake ‘n Feed® Flowering Trees & Shrubs Plant Food contains vital micronutrients, plus added organic ingredients, to nourish above and below the soil. It has been formulated with kelp, earthworm castings, feather meal and bone meal in an all-in-one particle to feed microbes in the soil. Microbes break down organic matter into nutrients that support root strength and development which increase water efficiency. Specifically designed for flowing trees, shrubs and other acid-loving plants to maintain deep, lush green foliage and colorful blooms throughout the season.