Nichols Arboretum hosts a Peony Peaking Party from noon-4 p.m. June 7 at the peony garden behind the Reader Center. Participants share watermelon and lemonade while enjoying the full blooms of the largest public collection of historic peonies in the United States. Sponsored by Matthaei Botanical Gardens and Nichols Arboretum, (734) 647-7600. (Photo courtesy Nichols Arboretum And Matthaei Botanical Gardens)