Miracle Gro, 4 Pack, 12-4-8, Liquafeed Refill, Revolutionary New Water Soluble Feeding System, Easy To Use, Insert Bottle Onto Attachment & Spray On To Feed & Water Plants, Automatically Mixes The Correct Amount Of Plant Food With Water, Bottle Empties In 15 Minutes So You Know When To Refill, Feeds At Even Rate Producing The Best Results, Guarantees Bigger, More Beautiful Plants.