Christina Pfeiffer

Christina Pfeiffer is a horticulture consultant, instructor, and garden writer with over 30 years experience in landscape management and arboriculture. In addition to being a frequent horticultural speaker, Pfeiffer has taught courses in pruning, arboriculture, and landscape management at Edmonds and South Seattle Community Colleges, and at the University of Washington.

Heather Evans

Heather Evans

HEATHER EVANS is an architecture graduate, permaculture enthusiast, and gardener. She spent time in Australia and New Zealand working on organic and permaculture farms in order to move her skills towards sustainable landscape design. Heather is currently living in Verona, Italy with her fiancé where she teaches English and hopes to get involved with Slow Food garden education and permaculture design.

Darcy Daniels


DARCY DANIELS is a Portland-based landscape designer and owner of Bloomtown Gardens. For more than 15 years, Darcy has been designing multi-layered residential landscapes filled with colorful and textured plants that delight the senses year round. She is passionate about plants and committed to helping homeowners connect with their outdoor living spaces. In 2016 Darcy launched eGardenGo, an inspirational, fun, and easy-to-use website for gardeners.


Sandy Fischer

Land Morphology

Sandy Fischer is a landscape architect, community designer, and a principal with Land Morphology. Sandy has a diverse and award-winning design portfolio of built projects in the Northern Rockies and Pacific Northwest regions and enjoys collaborating with interdisciplinary teams on challenging projects and idea-driven solutions. She seeks to understand each site within a larger context of ecology, time, culture, and community values.

Cordelia Donnelly

Cordelia Donnelly is a teacher, artist, designer, writer, and community activist whose gardening education has been facilitated by Pacific Horticulture. She communicates about the power of beauty to awaken, to inspire, and to help shift the gardening paradigm forward. A love of nature and of problem solving motivate her vision. A love of learning connects her to the world.


Tom Rau

Tom Rau  is CFO of Urban Water Group, Inc. He is a licensed Landscape Architect specializing in watershed-wise design of residential, commercial and public projects. His work has been published in The Journal of Green Building and Sunset magazine. Tom is an instructor in the UCLA Extension Horticulture and Gardening Program, and a past co-chair of Surfrider Foundation’s West LA/Malibu Chapter Ocean Friendly Gardens Program.

Mary Dodder McCorkle & Genevieve Holloway

Mary Dodder McCorkle is the former head of Cuesta College Journalism Department. Genevieve Holloway is a plant educator and designer. Their article on Leaning Pine Arboretum on the campus of California Polytechnic State University in San Luis Obispo brought its possible destruction to public attention. Cal Poly planners have now reconsidered and the Arboretum will continue to grow.

Nancy norris

Nancy Norris

Nancy Norris  has been designing and installing garden railways since 1997. Model railroad gardening combines her vocation as a horticulturist and plant science instructor with her hobby of modeling radio-controlled airplanes. She is a regular columnist and horticultural editor for Garden Railways magazine. Nancy’s book, Miniature Garden Guidebook, shows readers how to build their own outdoor railway garden.