Healthy trees can be the key to lush landscaping, so let Jobes Evergreen Tree Fertilizer Spikes be the key to your healthy trees. With a continuous supply of nutrients below the surface, Jobes Evergreen Tree Fertilizer Spikes can help enhance your yard with thriving trees all season. This slow-release formula works at your trees active roots just insert around the drip line of each tree. Its safe, free of any wasteful runoff and easy to use no mixing or measuring involved.