The Arnold Arboretum is known for its towering trees, but if you look closer you will see asters and goldenrods springing up amongst the oaks and the maples. What is the role of these spontaneous plants and how do staff encourage them through horticultural practices like no-mow areas? Join Horticulturist Ryan Devlin on September 12 for a free walking tour to get answers to these questions and more. Sign up at https://arboretum.harvard.edu/events/event-signup/?id=77946