/ those who know my peeves know how I hate mirrors in decorating and now this! taking mirrors outside to decorate is a horror -Artist Lee Borthwick installs mirrors in nature to offer a sense of peace and self-reflection.
Make cement cloth planters. Approximately a water/cement ratio. Add drainage holes in the planter before it completely hardens to prevent cracking. You may also want to apply a couple coats of cement sealer after the planter is dry.