(DC) (US Botanic Garden) Want to know more about orchid care and maintenance? As part of this year’s joint orchid exhibit in collaboration with Smithsonian Gardens, drop by the exhibit in the Kogod Courtyard in the National Portrait Gallery to talk with George Guenthner, USBG Gardener about orchids! Bring your questions and connect with USBG plant science professionals in this Expert Is In program.