Photos by Cheryl Landes The Rogerson Clematis Gardens has the most extensive collection of clematis of any other public garden in North America. Nineteen hundred clematis representing more than 850 species grow in this garden behind the historic farmhouse and the greenhouses at Luscher Farm in Lake Oswego, Oregon. Brewster Rogerson started the collection in … Continue reading Armchair photo tours: Rogerson Clematis Gardens in Lake Oswego, Oregon