Pumice is considered one of the central ingredients to Boon’s Mix, which is the name of the recipe famous in the international bonsai growing community. Pumice is valued for its ability to reduce excess water while retaining optimal moisture. It also promotes root growth and provides minerals and nutrients. This is the best quality and most uniform pumice stone product for your bonsai. It has no artificial colors or fillers. This product is a ready-to-use premium pumice product with consistent sizing perfect for bonsai and cactus. This pumice is sieved for a uniform size that is ready to use. Use also for a soil topper or mulch, a base layer in a pot, or a media additive to cactus and succulent planting mix.