Mary-Kate Mackey is an award-winning garden writer and co-author of Sunset’s Secret Gardens—153 Design Ideas from the Pros. She is a contributor to The Sunset Western Garden Book and Sunset’s Gardening in the Northwest. Her 100+ articles have appeared in national and regional publications such as Fine Gardening, Horticulture, and Sunset. Online she writes a monthly column for the U.S. Hartley-Botanic Greenhouse website.