Orchid Mixes! A variety of ingredients can be used, like fir bark, Hydroton, Orchiata Bark, Sponge rock, charcoal, lava rock, coconut fiber, redwood bark etc. The right potting mix provides plenty of drainages, air circulation, or moisture. If you would like to buy your mixes, contact us (561) 499-2810 Visit our website: www.greenbarnorchid.com