From Jobe’s Organics – bone meal fertilizer in a convenient, easy-to-insert spike that requires no mixing or measuring. Make your plant care easier with fertilizer spikes. The spikes are low odor and feed directly at the roots, delivering organic nitrogen, phosphorus and calcium. No harmful ingredients. They are simple and easy to use, which takes the guessing out of gardening - simply insert the spike into the base of the plant, there is no wasteful run-off. Jobe's spikes are people and pet friendly.