Full of beneficial biological's for a great start to your desert plants! Our very own hand made soil mix for succulents and cacti that need that extra drainage. Comes in a one gallon bag, measured by volume not weight. You will not find a better succulent / cactus soil. Ingredients include: coconut coir, peat moss, perlite, worm castings, forest hummus, bat guano,expanded clay / shale rocks, horticultural sand, horticultural charcoal, General Hydroponics Subculture M (mycorrhizae root inoculate), glacial rock dust & dolomite lime.