Make sure your landscape is full of healthy plants with beautiful blooms with Jobes® Fertilizer Spikes for Bulbs & Perennials. Convenient and easy to use, Jobes fertilizer spikes provide nutrition underground where plant roots can use it. Just insert spikes around plants and the slow-release formula feeds plants for up to 8 weeks. Plus, spikes ensure that nutrients arent washed away like surface applied fertilizers. The specially formulated, premeasured spikes make for a fast, easy and mess-free fertilizing experience. Spikes come in a waterproof, resealable pouch.