"Jobe's Organics All-Purpose Fertilizer Spikes give gardeners a fuss-free, environmentally friendly option for healthy and beautiful plants. These organic fertilizer spikes, specially formulated as all-purpose, 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. The premeasured spikes make for a fast, easy and mess-free fertilizing experience. For best results, use Jobe's Organics All-Purpose spikes at time of planting or early in the season."