Gwen’s Mix is The Worm Farm Portland’s premium and signature mix, with superb nutrients blended in and it has fabulous drainage. You will see superb results with no additional feed to the mix. This unique soil blend contains pumice, coconut coir, compost, worm castings, composted chicken manure, composted cow manure, feather meal, bat guano, seabird guano, Azomite rock powder, and diatomaceous earth - everything you need in a soil except the water.