Each disk is a completely renewable resource made from 100% natural recycled fibers of the coconut husk. A micro sponge effect dramatically increases the water retention of soil and improves aeration, ensuring optimal root growth and maximum water and nutrient uptake for lawn grasses and container and garden plants. Use anytime you have a need for a potting medium.To use, simply fill a bucket with a half gallon of water and place one disk in it for one hour. The disk will dissolve and the fiber will be ready to use.