Jobe’s Fertilizer Spikes For Beautiful Houseplants 13-4-5 50 pack – 2.2 oz These fertilizer spikes are specially designed to feed all varieties of houseplants where they need it most, at the roots. Unlike other types of fertilizers, Jobe’s spikes are pre-measured, giving your plants just the right dosage of nutrients so you won’t overfeed or burn them. And, by feeding underground, away from the soil surface, the slow release formula prevents waste and chemical runoff. Directions: For best results, insert new spikes every 60 days. Just push each spike into the soil around the plant, halfway between the plant stem and the edge of the pot, until the spike is just below the surface. The nutrients are gradually released to the plant’s roots, safely and continuously, every day. Water after inserting spikes. For 4″ pots, use 2 spikes For 6″ pots, use 3 spikes For 8″ pots, use 4 spikes For 10″ pots, use 5 spikes For 12″ pots, use 6 spikes Great for philodendrons, peace lilies, zebra plants, dieffenbachia and other non-blooming houseplants. Important: Keep out of reach of children and pets. Store in a cool, dry place and use soon after opening. We will combine shipping whenever possible. If you would like to know the shipping charges before paying for your combined order, please choose the “Request Invoice” option during checkout (or “Commit To Buy” without actually paying). Shoot us an email if you need assistance. Thanks for visiting my store. We are here to help you with all of your gardening needs. Please email us with any questions or concerns.