After being outside for just one season, these planters are already showing signs of deterioration. We put them outside first then when we received them in mid May.  They were not exposed to direct weather elements as there was a small roof over them.  We did 85% of the watering to make sure the plants were receiving adequate water. Once the season was over in September, we emptied them and put them in a dry area for the winter.  They are still attractive, but I really don't know how long they will last.