Per the manufacturer, if you are using Miracle-Gro Miracid Plant Food outdoors, you will use 1 tablespoon per gallon of water. For 100 gallons of water, you will use 6.25 cups. If you are using this product for indoor plants, you will use 1/2 teaspoon per gallon of water. For 100 gallons of water, you will be using 1.04 cups. Please let us know if you have any additional questions.
Answer last updated on: 08/13/2014