QUESTION: How long will it last. Answer: Due to varying temperature, climate and uses across the country there is no certain answer. It may last one month or a few months depending on usage. QUESTION: Can untreated burlap be used to cover plant material during the winter? Answer: Yes, burlap has widely been used to help protect plants from harsh winter conditions. We do recommend staying with the untreated burlap, some plants may be sensitive to the copper sulphate solution used on the treated burlap.