Miracle-Gro makes growing beautiful, vibrant houseplants easy with their Indoor Plant Food Spikes. Using the Miracle-Aerator spike, simply make a small hole in moist soil and insert the plant food spike. Then sit back, relax, and enjoy your happy houseplants. In spring and summer, spikes should be replaced every 30 days, while in winter and … Continue reading Miracle-Gro Indoor Plant Food Spikes, Includes 48 Spikes – Continuous Feeding for all Flowering and Foliage Houseplants – NPK 6-12-6