On Sunday, March 15, 1 to 4 p.m., come learn all about orchids from the experts, including how to care for them. Hands-on activities will include the art, the science, and the taste of orchids! Learn how to re-pot an orchid and pot one up to take home. Visitors of all ages are invited to explore the incredible world of orchids during this year’s Orchid Family Day. Free; no registration required. US Botanic Garden, 100 Maryland Ave. SW. usbg.gov.