The VYTAL Spiral Garden Planter is a beautiful, highly productive, efficient, vertical gardening design. Grow more plants in less space. Instead of planting on a flat surface, the spiral ramp maximizes the surface area for planting. This shape allows you to grow a more diverse range of herbs offering a variety of planting positions (sunny, sheltered and shady). The design also creates microclimates creating a drier zone at the top (for hardy herbs) and a moist area at the bottom (for water lovers). Easily assembles in minutes (just insert & tighten 2 nuts/bolts). Built to last with UV-resistant, BPA free polyproplene.