Multi purpose potting mixture for growing Cattleyas, Phalaenopsis, Dendrobiums, Paphiopedilums, Oncidiums and All Epiphytic Orchids | A Dynamic combination of western fir bark, hardwood charcoal and sponge rock specifically formulated by a team of highly trained orchid growers | Promotes healthy, strong growth by providing superior drainage, allowing for proper root ventilation | Contains 4 quarts