Circular plastic tree rings filled with mulch?
I once found at Home Depot these circular rings to be put around trees, which could then be filled with mulch. They were made out of plastic and included a disc to prevent weeds with a lip around the edge that looked like lawn edging once it was filled with mulch. Neither Home Depot nor any other garden store has them any more. All I can find are the rubber mulch rings. Does anyone know where to find them on the internet or in a store?