John A. Wott

John A. Wott, Ph.D. was a founding faculty member of the Center for Urban Horticulture, University of Washington, and is Director Emeritus, University of Washington Botanic Garden and Washington Park Arboretum.  He has a passion for public horticulture and plant propagation.  His degrees are from Ohio State University (1961) and Cornell University (1966, 1968).

Frederique Lavoipierre

Frederique Lavoipierre is the creator and author of “Garden Allies,” a series that ran for 10 years in Pacific Horticulture magazine. She also teaches classes and workshops on sustainable landscaping, including ecological principles, habitat gardens, beneficial insects, soil ecology, freshwater ecology, and aquatic invertebrates. Follow her on Facebook at

Steve Brigham

Steve Brigham and his wife Donna are the proprietors of Buena Creek Gardens, located in San Marcos in northern San Diego County. Steve is a founder of the San Diego Horticultural Society. Both have been active in the nursery industry in California for several decades.

Neil Bell

Neil Bell is a horticulturist with the Oregon State University Extension Service in Marion and Polk Counties, where he oversees the Master Gardener program. He researches the hardiness of woody plants for western Oregon with a particular interest in evergreen and mediterranean climate genera.

William Grant

William Grant is a garden writer and photographer based in Aptos, California, where he maintains an extensive collection of roses and other plants. An avid rosarian, he lectures around the world on his favorite subject, was a consultant for Botanica’s Roses, and edited the paperback edition.

Roger Raiche

Roger Raiche is the founder of Planet Horticulture, a design-build landscape firm that emphasizes unusual plants in naturalistic and ecologically minded garden designs. His twenty-three-year career at the UC Botanical Garden (Berkeley) transformed the California Collection. He collected extensively, discovered three species, and introduced many new native cultivars.