Espoma Kelp Meal Plant Food is designed to boost the growth and development of plants in a natural and organic way. It is composed of brown seaweed that are collected from cold sea waters, then prepared at a lower temperature - dried and ground to provide a healthy food for the plants. It also contains just the right amount of essential nutrients to ensure your plants will grow strong and healthy. It is ideal for use on flowers, trees, lawns and gardens. Each pound is equivalent to 3 cups.