The Jobe’s 01611 12 Count Evergreen Fertilizer Food Spikes are slow-release solid fertilizer spikes perfect for indoor and outdoor use. Made with phosphate and nitrogen ingredients, these spikes are designed for evergreens and trees. With a longevity of up to 8 weeks, these spikes are ready for use and come in a pack of 12. The mineral-based fertilizer comes in a convenient box packaging, making it easy to transport and store for all your gardening needs. Made in the United States by the trusted brand Jobe’s, these fertilizer spikes are a reliable choice for healthy plant growth.