Winchester Gardens Tree & Shrub Fertilizer Spikes 5-pack NPK 15-10-9

Winchester Gardens Tree & Shrub fertilizer spikes 15-10-9 is designed specifically for deciduous trees and shrubs. Examples are Maple, Beech, Birch, Oak, Ash, Elm, Willow, Catalpa, Katsura and Wisteria. This unique formula, manufacturing process with proprietary additives/minors called Nitrifiers © promote immediate and long term nourishment. In spike form, these fertilizer spikes will not runoff during sudden rainfall and will leech through clay soils making it healthier from microbial activity.