Mar 14, 2020 · In the center of the garden, geometric Cor-Ten steel planters mimic the look of boulders or sculptural tree stumps and provide rocky planting pockets for hens-and-chicks (Sempervivum sp.) succulents. Harper Design Build custom-made the bench (30 inches wide by 72 inches long) out of weather-resistant ipe wood so that the homeowners could enjoy