Espoma Plant Tone is the original, all-natural plant food specially formulated to give your plants, shrubs, and trees the necessary nutrients. It's an all-natural plant food with a unique blend of 100% natural and organic ingredients to provide balanced and complete nutrition to your plants. Its natural organic substance gradually breaks down to provide a safe and long-lasting food reservoir activated throughout the growing season. It is enhanced with Bio-tone beneficial microbes that boost the growth of plants.