Molly's Orchid Mix is a premium soilless potting mix that is specially-made for orchids growing in containers, with a range of mineral and organic ingredients that orchids love. * Premium, natural ingredients for orchid health: Includes Akadama, Hyuga, Pinus radiata bark, lava rock, pumice stone, assorted nutrients, horticultural charcoal, and an organic fibrous substrate for mycorrhizae and Bacillus pumilus. * Helps prevent over and under watering: Gritty, porous mix that drains freely and resists compaction, making it virtually impossible to over-water while still retaining enough moisture for your orchids. * Free of fertilizer, soil-borne pests, and disease: As a soil free potting mix, Molly's Orchid Mix is a cleaner alternative to soil-based potting mixes, and does not contain any harmful pathogens.