Michigan Dahlia Association. 1:00 pm - 3:30 pm Observer EditorObserver Editor, FreeFree Michigan Dahlia Association.: Demo on how to start and take cuttings from dahlias. U-M Matthaei Botanical Gardens, Rm. 125, 1800 N. Dixboro. Free admission; metered parking. Mask required. 647-7600. , . . . . . .