On July 14 a UWBG Facebook fan asked us what’s the story of Herb Robert at the Arboretum. UWBG Horticulturalist, David Zuckerman, replies with background information and his personal experience with this stinky weed. Herb Robert, aka, Stinking Robert. Geranium robertianum is an escaped ornamental herbaceous perennial native to Europe. It has quite a history of folklore and medicinal uses. It is a class B noxious weed in Washington(1998?) and first seen in our state in 1911, Klickitat.