Specially formulated to help build a nourishing environment that promotes beneficial microbial action where plants need it most - at the roots. This in-the-ground feeding is the most efficient delivery system for organics. Spikes will improve long-term soil quality by promoting beneficial microbial growth. The premeasured spikes make for a fast, easy and mess-free fertilizing experience. Ingredients: Feather Meal, Bone Meal, Sulfate of Potash, Proprietary Binders.