The Indoor/Outdoor Green Polypropylene Wheeled Trellis Planter is a truly unique one-of-a-kind planter designed in Holland, the land of flowers. Elegant and classic, this Indoor/Outdoor Green Polypropylene Wheeled Trellis Planter is ideal to grow your fondest plants that may require a support frame.. It has a clever double bottom self-watering system. It has lockable wheels, which make it easy to move from one place to another. The square-shaped planter can be used both indoors and outdoors. The planter is easy to maintain as it is water, warp, and fade resistant. It requires some assembly when it is being set up.