Carol Adelman

Carol A. Adelman and her husband, Jim, grow over 550 varieties of peonies near Salem, Oregon. Carol is a popular speaker who is internationally respected for her knowledge of peonies. She was on the Board of Directors for the American Peony Society for 19 years, on the international Peony Advisory Board for the Peony Garden at Nichols Arboretum at the University of Michigan, and President of the Pacific Northwest Peony Society. She has received the American Peony Society Best of Show eight times since 2002, as well as numerous Court of Honor awards. She is co-author of "Peony: The Best Varieties for Your Garden," which made the New York Times Summer Reading list. Carol is now transitioning to hybridizing peonies, especially tree peonies, as the younger generation of Adelmans take over the day-to-day business. Their garden and fields are open to visitors during bloom season.

Growing Gorgeous Peonies
Bess Bronstein

Bess Bronstein is a horticultural consultant, educator and ISA Certified Arborist® based on the Kitsap Peninsula in Kingston, Washington, with over 35 years experience in arboriculture, landscape management and garden design. She was an instructor for the Edmonds College horticulture program for 28 years, with a focus on courses in pruning and tree care, plant identification, plant pests/diseases and diagnosis, and soils. Bess frequently teaches public and professional arboriculture and horticulture courses throughout the Pacific Northwest, and supports ongoing education in sustainable landscape management practices and tree care.

Japanese Maple Selection & Management
Trevor Cameron

Trevor started in his grandmother's garden, continued in his parent's garden, and now has over 30 years of experience in his own garden. His passion as a parent is sharing his love for gardening with his two boys just like his parents did for him. When choosing a favorite plant he said, "That's a tough one.. How 'bout I'm a 'plantaphile!'" Trevor is a Certified Professional Horticulturist and serves as the General Manager at Sunnyside Nursery in Marysville.

Plants for Winter Pizzaz — Foliage, Bark, Fragrance, Color, Bulbs
A Walk Through Evergreen Arboretum and Gardens
Dr. Linda Chalker-Scott

Dr. Linda Chalker-Scott has a Ph.D. in Horticulture from Oregon State University and is an ISA Certified Arborist and an ASCA Consulting Arborist. She is WSU Extension's Urban Horticulturist and a Professor in the Department of Horticulture, and holds two affiliate associate professor positions at the University of Washington. She conducts research in applied plant and soil sciences, publishing the results in scientific articles and university Extension fact sheets. In 2020, she was named the new editor for the Western Arborist magazine.

Linda also is the award-winning author of five books: the horticultural myth-busting "The Informed Gardener" (UW Press, 2008), "The Informed Gardener Blooms Again" (UW Press, 2010), "Sustainable Landscapes and Gardens: Good Science – Practical Application" (GFG Publishing, 2009) and "How Plants Work: The Science Behind the Amazing Things Plants Do" (Timber Press, 2015). Her latest book is an update of Art Kruckeberg’s "Gardening with Native Plants of the Pacific Northwest" (UW Press, 2019), which has won several national awards since its publication.

In 2018 Linda was featured in a video series – The Science of Gardening – produced by The Great Courses. She also is one of the Garden Professors – a group of academic colleagues who educate and entertain through their blog and Facebook pages. Linda’s educational contributions to science-based information have been recognized by such groups as Garden Communicators International, the National Association of County Agricultural Agents, and the International Association for Arboriculture.

"The Informed Gardener" webpage:
"The Garden Professors" blog:
"The Garden Professors" Facebook page -
"The Garden Professors" Facebook group -

Resilient Gardens and Landscapes – What Works, What Doesn’t, and Why
Karen Chapman

Born in England, Karen Chapman grew up with a trowel in her hand.

Karen is a Certified Professional Horticulturist. After moving to the Pacific Northwest in 1996, she joined one of the leading garden nurseries as a garden plant specialist. Ten years later, she established Le Jardinet, specializing in creating artistic plant combinations with a four-season foliage framework, functional outdoor living spaces, and deer resistant, summer-dry designs.

Karen’s articles and designs have been featured in many national publications - Fine Gardening, Country Gardens, Sunset, and Garden Design. She has co-authored two books: the award-winning "Fine Foliage" (St. Lynn’s Press, 2013), the highly acclaimed "Gardening with Foliage First" (Timber Press, 2017), and most recently released, "Deer Resistant Design: Gardens that Thrive Despite the Deer" (Timber Press, 2019).

The Squish Factor: Designing Abundant Containers
John Christianson

John Christianson started in the horticultural profession as a teenager, working as a greenhouse laborer at Saxe Greenhouse in North Seattle. Later, he managed the Nursery Department at Molbak's Nursery in Woodinville. John and his wife, Toni, have owned Christianson's Nursery for over 30 years. Located in the Skagit Valley, it is a destination for rare and unusual plants in an historic setting. John and Toni have created many People's Choice Award-winning gardens at the Northwest Flower and Garden Show.

Sharon J. Collman

Sharon Collman was one of the founding members of the WSU Master Gardener Program in 1973. She has taught classes on Integrated Pest Management, plant problem diagnosis, insect identification and appreciation and beneficial insects in the landscape, throughout the Pacific Northwest and in Canada and England. She has authored over 75 publications and received numerous awards for her educational programs. Sharon is building a Bugs and Blights website

Building a Pollinator Garden: From Lawn to Blooming Exuberance
Marcia Dillon

Marcia Dillon has been a Master Gardener since 2012. She manages the tomato beds and greenhouse operations at the Bellevue Demonstration Garden, where they trial the latest varieties in a quest to find the perfect tomato. She grows about 100 varieties each year and is actively involved in breeding trials for the Dwarf Tomato Project.

Grow Tomatoes in the Drizzly Pacific Northwest
Toni Gattone

Toni Gattone's enthusiasm is contagious. She is passionate about empowering gardeners with practical, how-to information. Her mission and purpose is to help people adapt their gardens for greater comfort for years to come. Her book, "The Lifelong Gardener, Garden with Ease & Joy" is filled with hundreds of tips, tools, and techniques to help you garden as you age. It has been so well received, it's already in its second printing.

Toni’s articles have appeared in Better Homes & Gardens, Garden Gate magazine, Old Farmers Almanac 2022, The Bellevue Botanic Garden and GardenSmart newsletter. She is featured in a new book by Mary-Kate Mackay called The Healthy Garden, Simple Steps For A Greener World, and is a contributor for Home, Garden, and Homestead website.

Toni was honored last year to receive a prestigious award for her speaking from Garden Communicators International. She won the Gold Medal of Achievement for her seminar you will hear today.

Gardening Pain-Free: How to Garden for Life!
Sue Goetz

Sue Goetz is an award-winning garden designer, writer, and speaker. Through her business, she works with clients to personalize outdoor spaces-from garden coaching to complete landscape design. Writing and speaking are other ways Sue shares her love for the garden offering seminars and hands-on workshops. She is the author of the books Complete Container Herb Gardening, A Taste for Herbs, and The Herb Lover’s Spa Book.

Garden Design Makeovers
Toni Grove

Toni Grove is a Master Gardener alum with a B.S. in Herbal Sciences from Bastyr University. She is the former nursery manager at Lavender Wind Farm and currently works for Mary's Weeding Service, keeping Whidbey Island tidy, one flower bed at a time.

Herb Gardens
Rhonda Fleming Hayes

Rhonda Fleming Hayes is the author of "Pollinator Friendly Gardening: Gardening for Bees, Butterflies and Other Pollinators."

Rhonda is an award-winning writer and photographer applying her passion for all things plant-related with wit and solid, research-based advice. She contributes unique feature stories to Northern Gardener magazine as well as her popular “Pollinators” column. She has also been published in Southern Living, Midwest Living, and Mpls.St.Paul magazines, and many more. She is the winner of three GWA Media Award Silver Medals.

Rhonda is a native Californian with Southern roots now living in Minnesota. Following her husband’s nomadic career, she has lived and gardened in Tennessee, Kansas (twice), Illinois (twice), Iowa and even England. Regardless of location she has learned to bloom where she’s planted.

Rhonda gardens in Minneapolis in an urban neighborhood surrounded by woods and water. The abundant quarter-acre is home to many bees, butterflies, birds and beneficial insects. She loves to share the fruits (and veggies, too) of her garden with friends, family and wildlife.

Rhonda became certified as an Extension Master Gardener in 2000, but has been gardening in some form or fashion since she was a child at her grandmother’s knee. She is a member of the Garden Writers Association, The Herb Society of America, and the Minnesota State Horticultural Society. She is a trustee of the Minnesota Landscape Arboretum.

Bountiful and Beautiful: The New Kitchen Garden
Tricia Heimer

Tricia has been working in school gardens since 2016. As part of the WSU Extension Island County SNAP-Ed program, she has been helping children and adults learn how to grow their own food in school and community gardens.

Vegetable Gardens Tour
Gwen Hoheisel

Gwen Hoheisel is a regional extension specialist with Washington State University focusing on perennial fruit crops and, more specifically, sustainable pest management, blueberry horticulture, and application technologies. She has degrees in Zoology from the University of Maryland and Entomology from Pennsylvania State University, focusing on Integrated Pest Management and insect diversity. She has worked more than 15 years in the Washington tree fruit, grape, and berry industries.

Growing Backyard Grapes
Growing Backyard Blueberries
Ed and Martha Hollis

Island County Master Gardeners since 2013, Ed and Martha Hollis met many years ago in a community college Landscape and Nursery program in San Diego. Ed went on to get a degree in Horticulture from Cal Poly, while Martha got hers in practical experience. They worked as Southern California landscape maintenance professionals for over 30 years. After retiring, they moved to Whidbey Island, where nature provides most of the irrigation. Both are passionate about the benefits of proper pruning for healthy, thriving landscapes!

Hands-On Pruning Techniques
Judith Jones

Judith Jones' Fancy Fronds started in 1977 and began mail order in 1982. For thirty years, Judith has participated at the Northwest Flower and Garden Show, in everything from landscape displays to plant lectures. She feels fortunate to have the support and encouragement of professional pteridologists and fern growers all over the world.

Fronds & Ferns = Fabulous
Shondell Kelley

Shondell has spent decades studying native flora and fauna, ethnobotany, herbalism, environmental horticulture, organic gardening, permaculture, composting, food production and preservation. She earned a degree in Horticulture and is a Certified Professional Horticulturist. She has certifications in Environmental Education and Permaculture Design.
Shondell has created award-winning children’s day camps, has assisted in the creation of pea patches and volunteer gardens, and has taught many classes and given many presentations.
As the owner of Nature’s Hands Gardening, she has started specializing in consultation, education, coaching, and design.
Shondell feels strongly that each person has the right and the responsibility to be the best caretakers they can be of their small piece of Earth.

Yeah, but Why? An Explanation of Best Pruning Practice
Gary Ketcheson

Gary Ketcheson moved to Whidbey Island 10 years ago after a career as a Hydrologist with the US Forest Service, managing soil and water resources. Over the years he has become deeply interested in trees, their unique properties, and the many benefits they provide. He became a Master Gardener in 2013 and is a regular volunteer at the Greenbank Demonstration Garden.

Healthy Conifers as Dynamic Organisms
Don Krafft

Don Krafft is a WSU Island County Master Gardener and former Master Composter in Santa Clara County, California. He is focused on practicing and teaching soil and water management and composting for home and community gardeners. In addition to the Master Gardener and Master Composter trainings, Don has completed the comprehensive Soil Food Web and Microscope Soil Analysis courses and is currently managing composting piles at home and at the South Whidbey Tilth Community Garden.

A Convenient Truth — Composting for the Home Gardener
Paul Kusche

Paul Kusche is the Owner, Operator and Hybridizer of Papa Paul’s Dahlia Farm in Olalla, WA. Paul is President of the Kitsap County Dahlia Society and is also a Kitsap County, WA and Bonner County, ID Master Gardener. Paul started growing dahlias in Sandpoint, ID with the challenges of snow, frozen ground and a shorter growing season. In 2019 Paul and his wife Teena came back to the PNW and Olalla, WA to be with family. Papa Paul’s Dahlia Farm has over 250 Varieties and seedling beds for hybridization. Paul is a frequent Garden Club and Master Gardener Seminar Speaker. His latest work, “Powdery Mildew–Nemesis of the Garden”, will be featured in the American Dahlia Society Spring Bulletin. Papa Paul’s Dahlias was the cover story in the July 2020 West Sound Home & Garden Magazine.

Improving Your Success with Dahlias
Deirdre Griffin LaHue

Deirdre Griffin LaHue is an Assistant Professor of Soil Quality and Sustainable Soil Management at WSU’s Northwest Washington Research and Extension Center (NWREC) in Mount Vernon. Working across annual and perennial systems, her research and extension program focuses on the impacts of agricultural practices on soils’ physical, chemical, and biological properties, how these properties interact, and how to tailor soil health assessments to Pacific Northwest soils and cropping systems. Deirdre received her M.S. and Ph.D. in Soils and Biogeochemistry from UC Davis.

Diversity Underfoot — Exploring Soils and How to Manage Them
Jean Lawler

Jean is currently semi-retired here on Whidbey Island after having purchased a garden...with an attached house! A good portion of her time is spent in extending the existing garden. Success finally occurred after fencing off the inner acre to prevent deer encroachment, which eliminated the destruction of every plant planted and allowed for the introduction of perennials more attuned to the needs of bees. Jean has had bee hives on her property for over 10 years now with various success, basically due to the unique weather conditions of this island.

Bees in Your Garden - Beekeeping
Randy Lee

Randy grew up on a farm in the Yakima Valley. He worked in the fruit industry for many years and was a professional student. Currently, he is a backyard grower with many types and varieties of fruit.

The Phases of Fruit Tree Management
Vanca Lumsden

Vanca has been gardening for decades having owned and operated a wholesale aquatic plant nursery and a retail nursery. She partnered with Judith Jones to build over 21 display gardens for the Northwest Flower and Garden Show. Vanca recently developed a website listing all the nurseries in Oregon and Washington west of the Cascades. She also makes colorful banner/flags and rustic furniture from corkscrew willow.

Botanic Nomenclature for 'Fraidy' Cats
Deb Mitchell

Deb earned her B.S. in Horticulture from South Dakota, so not a lot of her degree applies to the Pacific Northwest other than basic botany. She spent 20 years in the Navy, traveling the world and learning different ecosystems, and appreciated that the Navy funded her explorations. She has been a Master Gardener since 2006, and also has a teaching certificate in the Sciences, hence her love of teaching. Deb appreciates feedback and she's always looking to improve her classes.

Propagation Methods to Expand Your Garden
Dixie Mitchell

A Skagit County Master Gardener since 2000, Dixie Mitchell discovered a passion for hardy succulents and their enchanting year-round color. She enjoys sharing her successes and challenge (deers and bunnies) with fellow gardeners. Her garden contains over 200 succulents!

A Successful Succulent Garden
Kelsi Mottet

A sixth-generation Whidbey Islander, Kelsi is currently a Natural Resource Planner at the Whidbey Island Conservation District. Over the last six years of working with the island community in her WICD role, she has enjoyed inspiring landowners and residents through interactive educational presentations, partnership development, community collaborations, and technical land-use planning assistance with the goal to empower people to better manage their land's natural resources.

Landscaping Your Property with Wildfire Preparedness in Mind
Anza Muenchow

Anza Muenchow has perfected the art of propagating plants by growing food at her two-acre Maha Farm for the past 15 years. But beyond her farming expertise, she is also passionate about improving fresh food access for her community, especially low-income families. And, as a Master Gardener since 1992, she is the go-to expert for other Master Gardeners who want information on propagation techniques. Anza also volunteers for Master Gardeners at South Whidbey Tilth.

Food Lover's Gardens
Seed Propagation
Emily Murphy

Emily is a regenerative organic gardener with a B.S. in Ethnobotany from Humboldt State University, where she studied botany, environmental and soil science, and ecology, as well as cultural studies and herbal medicine. She later studied education at Sierra Nevada College and garden design with the California School of Garden Design. She teaches and speaks regularly about gardening and living, and her writing appears in numerous publications such as Better Homes & Gardens. Emily is the author of "Grow Now: How to Save Our Health, Communities, and Planet — One Garden at a Time" (Timber Press, 2022), and "Grow What You Love" (Firefly, 2018). Emily is also a photographer, cook, garden design coach and consultant, and creator of the celebrated blog, Pass The Pistil.

GROW NOW: A Guide to Garden-Based Climate Activism
Tobey Nelson

Tobey Nelson has a B.S. in Landscape Horticulture from Michigan State University and is a Certified Professional Horticulturist. She has been designing, installing, and maintaining gardens for over 25 years. Tobey Nelson Events + Design offers garden design and coaching, floral design for special occasions and weddings, and botanical art. She focuses on environmentally-responsible approaches, such as drought-tolerant plantings, supporting local farmers, and sustainable floral design methods.

Winter in a Vase: Enhance Your Off-Season Cutting Garden — Includes a Floral Demonstration
Small Space Gardening - How to Make Your Garden Feel Larger
Zsofia Pasztor

Zsofia Pasztor is the founder and co-executive director of the non-profit organization Farmer Frog. Farmer Frog started with a food garden at a school in Everett, Washington in 2010. Today it supports a dozen school gardens in the state, work with several sites in urban and rural communities, and is developing two farms on acreage. Zsofia teaches restoration horticulture, urban agriculture, aquaponics, and low-impact development at several US colleges and abroad.

How to Use Common Permaculture Practices
Dr. Robert Pelant, DVM

Dr. Pelant is the founding CEO of the Pacific Rim Institute (PRI) based on Whidbey Island, WA. PRI is a 175-acre site containing old Douglas fir and Pacific yew forests and one of the largest and most diverse prairie remnants in the entire region. Prairies are Washington's most endangered ecosystem. A veterinarian by training, Robert has worked and lived most of his adult life in Asia, Latin America and Africa. His focus then was holistic development for mostly rural peoples. Since 2009 with PRI, he is combining that experience with a more scientifically based approach to restoring the ecosystems in which we live. He obtained his BS degree in 1977 and his Doctor of Veterinary Medicine from the University of Minnesota in 1981.

Native Plants, Native Prairies
Christina Pfeiffer

A horticultural consultant and educator with 40 years experience and a long-time pruning instructor at Edmonds Community College, Christina Pfeiffer holds degrees in Horticulture from Michigan State and the University of Washington, and is an ISA Certified Arborist. She is the author of "Pacific Northwest Month-by-Month Gardening."

Gardening under Large Trees
Susie Reynolds

Susie Reynolds is a Master Gardener and horticultural specialist. She is the nursery manager for Meerkerk Gardens, where she is responsible for all phases of nursery operations. She has in-depth knowledge of how to grow and maintain rhododendrons and azaleas, after being associated with the gardens for 21 years.

Rhododendrons and Azaleas in Your Garden
Sarah Schmidt

Sarah Schmidt is a wildlife biologist active with Whidbey Audubon Society and Bats Northwest. Sarah's fascination with bats originated in the early 1990s when she attended a workshop on endangered, small mammals of the national forests, while working for the US Forest Service in Arizona. There she became fascinated with bats, the nocturnal, flying mammals more closely related to humans than to rodents, with which they are often compared. For more information about Sarah and bats, see Dan Pedersen's article, "Living with Bats on Whidbey Island" at

Learn About those Insect-Eating, Fertilizing Bats
Eric Studebaker

Eric Studebaker is an area garden and landscape consultant who has been in the nursery trade for over 30 years, and is well-versed on island gardening challenges like drought, wind and deer. He was the trees and shrubs buyer at Whidbey Island’s Bayview Farm and Garden for over a decade and, more recently, the manager and buyer at Venture Out Nursery. He is a respected expert who has presented Whidbey Gardening Workshop talks on Great Northwest Roses, Japanese Maples and Small Shrubs and Trees, and is a speaker at various area gardener events.

Ideal Trees and Shrubs for the Pacific Northwest
Marni Swart

Marni Swart is the founder and owner of Growing Roots Together, a place for urban farming and gardening enthusiasts to learn to grow food and build resilient and healthy soil, ecosystems, and communities. Marni is a certified sustainable urban agriculturist, community educator, garden coach, and healthy soil enthusiast.

More info:
Follow Growing Roots Together on Facebook and Instagram @GrowingRootsTogether.

Landscaping with Vegetables
Kathy Thornburgh

Kathy Thornburgh studied botany and plant ecology at the University of Tennessee and marine ecology at the University of Washington. She was a Preserve Steward for The Nature Conservancy, a Habitat Biologist for Alaska Department of Fish and Game, ran a water quality lab for the Tulalip Tribes, and retired after 20 years with Snohomish County, working on water quality and environmental monitoring, public education, and habitat stewardship. She is an avid bicyclist and serves on the board of the Skagit Land Trust. Kathy became a Master Gardener in Skagit County in 2013 and is actively involved in intern training and plant clinics.

Water-Wise Gardening Techniques
Carey Thornton

Carey Thornton teaches classes and workshops as part of Tilth Alliance's Community Education team on topics including organic gardening, composting, food preservation, and permaculture.

The Science of Companion Planting
Thomas Vincent

Thomas Vincent is an Island County Master Gardener. He and his wife have an eighteen-acre farm in Langley, Washington, with horses, chickens, ducks, and lots of compost piles.

Hot Composting
Dan Vorhis

Dan Vorhis has a B.S. in Agriculture from Ohio State University, as well as nearly 40 years experience in fruit horticulture. With his wife, he owns and operates Muscle and Arm Farm, a small farm and orchard in Freeland, Washington.

Bench Grafting Fruit Trees
Laura Watson

Laura Watson enjoys sharing her ever-increasing knowledge of vines. She regularly attends international clematis conferences and is a garden writer/blogger. Laura is proud to be a King County Master Gardener and Plant Amnesty Master Pruner.

Grow the Heck Up! With Vines
Diana Wisen

Diana Wisen is a 30-year WSU Master Gardener. She has been a Skagit County Master Gardener trainer for 20 years, served as Chairman of the Outreach and Education Committee, as well as their Speakers Bureau, and regularly teaches gardening classes to a variety of audiences.

Gardening in the Shade — The Delights and Challenges
25 Tips AND MORE to be a Successful Gardener
Hans Wressnigg

A graduate of the Ornamental Horticulture program at the Edmonds Community College, Hans' training includes an internship with the head gardener at Nitobe Memorial Japanese Garden (University of British Columbia, Vancouver). He has also studied gardens in Kyoto, Japan. Hans and his wife design, build and maintain gardens in and around Whatcom County.

CANCELLED Residential Garden Project: Japanese Dry Landscape Garden