"Orchids: Masters of Deception"

For 29 years the U.S. Botanic Garden and the Smithsonian Garden have jointly hosted special exhibits to show off their vast orchid collections. This year's iteration is all about orchids that aren't exactly what they seem. Expect these delicate flowers to be arranged into awe-inspiring, tall plant sculptures—this year includes 9-foot tall "cherry trees" of pink and white orchids, plus curtains of orchids with special roots that mean they can live without soil. 

Time Out tip: Are you a plant parent in need of some help? If you email or call the U.S. Botanic Garden's free Plant Hotline with your plant care questions, the garden's experts will answer your gardening questions.