Trees planted in suitable containers can last up to 20 years. The roots will probably have filled the container after that time and replacement plants will be necessary. For the 20 or so years before that you can enjoy just looking at the planters you have chosen. You won't even have to paint them if you choose the right material. The glassfibre Versailles style planters below will outlast the trees planted in them and indeed will outlast the next batch of trees. Possibly even the batch after that!
|Glassfibre (GRP) Versailles planter|