The Tumbleweed Worm Farm Bedding Block is ideal for setting up your worm farm. Made from 100% natural coconut fiber, this bedding block will expand up to 10x its original size in water. Add water to expand in a big bucket, then simply cover with more soil once set. Add worms, food waste and scraps for an easy-to-maintain organic waste disposal system for your kitchen or garden. This creates the ideal bedding to start up your worm farm.