Weekends May 10-11 10 a.m. - 4 p.m. Weekdays Fri. May 9, Mon. May 12- Fri. May 16 4-7 p.m. Escape the crowds at the Lilac Festival for a little while and stroll over to The Ellwanger Garden at 625 Mt. Hope Avenue. Rochester’s “secret garden,” filled with colorful perennials, The Ellwanger Garden is maintained by The Landmark Society of Western New York. It will be open to the public daily during Lilac Festival.