Lasting color: Miracle-Gro Tree & Shrub Plant Food Spikes promote vibrant color and foliage for trees and shrubs in your yardProvides nutrition: These easy-to-use outdoor plant food spikes provide slow release nutrients directly to your trees' roots, where they need it mostStimulates growth: Use with deciduous, flowering and evergreen trees as well as acid-loving plants like hydrangeas, azaleas and magnoliasApplication: Apply the outdoor plant food spikes once in spring and once in fall by placing tree spikes around the tree's drip line with at least 3 ft. between each spike (see packaging for more details)Coverage: This package includes 12 Miracle-Gro Tree & Shrub Plant Food Spikes, enough to feed 3 trees with a 4-ft drip line diameter or 1 tree with a 12-ft. drip line diameter