I made the mistake of obtaining Stall Dry when I wanted Dry Stall. It is a regrettable mistake-it is volcanic dust used to soak up urine and water (around a horse, of course) . We use pumice at Wave Hill in our propagation mix for cuttings and we used to get Dry Stall from Agway. They don't carry it anymore; now we use 4-quart bags of volcanic pumice from a company called "Glorious Gardens". Unfortunately our source is in the Midwest and the shipping is rather steep, but it is the real thing. Scott Canning Director of Horticulture Wave Hill ~ A Garden and Cultural Center 675 West 252nd Street Bronx, NY 10471 (718) 549-3200 x261 http://www.wavehill.org/ <http://www.wavehill.org/>