Margaret Roach has worked for more than 25 years to create her garden in the Hudson Valley-Berkshires area, a visual treat every day of the year. Meet the plants and the philosophy that make it happen, delivered with a dose of ‘horticultural how-to and woo-woo.’ Her new book, ‘A Way to Garden’ will be available for signing. $40 per person. Contact:Preregistration is required. To register, arboretumfriends.org.