(DC) (US Botanic Garden) Rarely does the public get to see the Garden’s growing facility – 85,000 square feet under glass divided into 34 greenhouse bays and 17 environmental zones. Come see the facility and the many thousands of plants we grow there! In addition to foliage and nursery crops, you’ll see USBG collection plants not currently on display, including orchids, medicinal plants, carnivorous plants, and rare and endangered species. Register for one of the open house times to meet the gardeners, ask questions, and wander through this working wonderland of plants.