These planters are shaped from steel by skilled craftsmen utilizing precise folding of the metal to create a planter that uses no welding during the manufacturing process and assembles into a rectangular shape from five panels. Planter panels interlock together to form an incredibly solid plant container that can accommodate large plants. Most of all, the planter is simple, stylish, modern and minimalist. Corten steel planters do not ship pre-weathered and will arrive with the bare steel finish which will have to weather over time to develop its attractive and protective patina of rust. They should be placed on grass during weathering process to avoid staining of adjacent materials.