Dear Joe, I too look eternally for a cheap supply of pumice. Charley's Grenhouse Supply has it in good sized bags, but it is expensive to mail order. I didn't know that Smoley carried it. I live in PA and would stop at his place when I am next in that part of the state if I knew he had it. Best wishes, Dell -- Dell Sherk, SE PA US Zone 6. Amaryllids, South Americans, Cyrtanthus, Hardy bulbs, succulents and cactus, gesneriads.