_Fallopia japonica_, also known as Japanese knotweed, fleeceflower, Mexican bamboo, and other common names, is a highly successful, non-native perennial from eastern Asia. It can be seen along roadsides, riverbeds, and in empty lots in impenetrable stands up to 10 feet in height. It is indeed tough. But in the early spring, it is also tender…and edible. Pamela Thompson, Arnold Arboretum Manager of Adult Education, was joined by edible enthusiasts and brewers to share the history of this plant’s movement around the globe and the gustatory possibilities of this pernicious perennial, including beer. **What’s a Tree Mob™?** Tree Mobs are interactions with scientists or other specialists at the Arnold Arboretum, and provide another pathway to enjoy and learn in the landscape. Experts share little-known facts about our living plant collection, its relevance today, and its importance to future generations. A Tree Mob may attract a small group or a large gathering—we won’t know until it takes place. Join us in the landscape and discover something new.