Use what the growers use! This soil mix is exactly what we use to grow our cacti and succulents. Our mix offers fast drainage and all the nutrients your cacti and succulents need. 50/50 mix of Pumice and Organic compost. Each resealable and compostable bag comes with 8 dry quarts of cactus and succulent soil. Enough soil to fill two one gallon nursery containers. The weight of each bag is approximately seven pounds.