0The Miracle-Gro Indoor Plant Food 48-Spikes Fertilizer Spikes are a convenient and efficient way to nourish your indoor plants. These slow-release spikes contain essential ingredients like phosphate and nitrogen, providing a steady supply of nutrients for your plants. Designed for indoor use, these spikes are compatible with a variety of plants including flowers, potted plants, and all-purpose gardening. The 2.2-ounce size makes them easy to handle and use, with the added convenience of being ready to use straight out of the box. Made in the United States by the trusted brand Miracle Gro, these fertilizer spikes are a reliable choice for keeping your indoor plants healthy and thriving.