I did not see the original post - but plastic will rot anything under it. People here in Mass. cover lawns with plastic, or even tarps, in order to kill grass, and everything else, to re-seed. People here use HAY for protection in winter. It would also be a much better insulator than a sheet of plastic. -----Original Message----- From: Jtlehmann@aol.com To: pbs@lists.ibiblio.org Sent: Mon, Nov 8, 2010 2:25 pm Subject: Re: [pbs] Reflectix I realize the interest is covering the entire bed, and not individual plants, but as a word of caution: I have known people who used regular bubble wrap to protect individual tender plants without success; I know of no one who has used it with success. The plants rot over the winter.