Make fertilizing trees effortless with Miracle-Gro Tree and Shrub Spikes (1.1kg). Specifically formulated for trees and shrubs, Miracle-Gro Tree and Shrub Spikes are a one-and-done for healthy trees and shrubs. Plant a spike under your tree or shrub once in the spring and again in the fall. Packed with essential micronutrients like worm castings and sea kelp, Miracle-Gro Tree and Shrub Spikes nourish above and below the soil to support root strength and are ideal for evergreens | Miracle Gro Tree and Shrub Spikes 15-5-10 Size 1.1kg