Imperial Cattleya Orchid Mix is made with: Medium Orchiata™ Monterey Bark Large Sponge Rock Hydro LECA Medium Cork Nuggets RePotme Imperial Cattleya Orchid Mix is hand made with extraordinary ingredients. It is an excellent choice for a wide variety of orchids such as Cattleya, Laelia, Potinara, Coelogyne, Stanhopea, and any thick rooted orchid. The Imperial Cube is packed in its own box and sealed with a clear plastic liner. Our Imperial orchid mixes are probably the finest plush mixes available anywhere and are perfect for the orchids in your collection.