INSTRUCTORS: Friday, October 2 - Opening Plenary Panel

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Dr. Linda Chalker-Scott

Dr. Linda Chalker-Scott has a Ph.D. in Horticulture and is an ISA certified arborist and ASCA consulting arborist.  She is WSU’s Extension Urban Horticulturist and an Associate Professor in the Department of Horticulture, and holds two affiliate associate professor positions at University of Washington. She conducts research in applied plant and soil sciences, publishing the results in scientific articles and university Extension fact sheets. Linda is an award winning author of 5 books including How Plants Work: The Science Behind the Amazing things Plants Do (2015), the horticultural myth-busting The Informed Gardener and an update of Art Kruckeberg’s Gardening with Native Plants of the Pacific Northwest (2019).

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Sharon 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 ID and insect appreciation and beneficial insects in the landscape throughout the PNW and in Canada and England.  She has authored over 75 publications and received numerous awards for her educational programs.

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Todd Murray

Todd Murray is Director, Agricultual and Natural Resources Extension Program Unit; Washington State University College of Agriculture, and does research and outreach in forest health and invasive pests.

INSTRUCTORS: Friday, October 2 - Session One: 1:15-2:15 pm

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Sue Goetz

 Garden Design Makeovers!  

Sue Goetz, CPH, ECO_Pro, is an award-winning garden designer, writer and speaker. Through her business, Creative Gardener, she works with clients to personalize outdoor spaces – from garden coaching to full landscape design. Her work has earned gold medals at the Northwest Flower & Garden Show and other specialty awards, and she is the author of A Taste for Herbs (2019) and The Herb-Lover’s Spa Book (2015).

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Mary Dessel

Creating Pollinator Friendly Gardens

Mary Dessel is a Mason County Master Gardener active on the Education Committee organizing the MCMG’s educational workshop series, Through the Garden Gate, as well as helping teach MG training classes and community outreach events. She has a B.S. in nursing and in forestry and a Masters in Forestry with an emphasis on forest entomology, and was a park naturalist in the Hoh Rain Forest in Olympic National Park.

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Linda Gilkeson

Year Round Organic Gardening in Western Washington State

Linda Gilkeson has a Ph.D. in Entomology. She worked for a private biocontrol company and later for the British Columbia government on programs to eliminate pesticide use. She now gives workshops on pest management and organic gardening and is a popular instructor in BC Master Gardener programs. Her book, Backyard Bounty: The Complete Guide to year-Round Organic Gardening in the Pacific Northwest, is a BC best seller. 

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Tim Kohlhauff

 Garden Lessons in a Box

Tim Kohlhauff is the urban horticulture coordinator for WSU’s Spokane County extension office, where he leads the Master Gardener volunteer program.  He is an adjunct instructor at Spokane Community College where he has taught Arboriculture, Advanced Arboriculture, Plant Problem Diagnosis, and pest management classes. For 10 years, Tim was the arborist at the Spokane Country Club golf course.  He has been a certified arborist since 2004.  

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Dale Whaley

 Glyphosate Resistance and Cancer...What's the Latest News?

Dale Whaley has been working for Washington State University Extension for 17 years. He has expertise in entomology (Master of Science, WSU), integrated pest management (IPM) (Bachelor of Science, WSU), noxious weed control, invasive species, and alternative cropping systems and continues to work as a regional coordinator for the Washington State Integrated Weed Control Project. Dale enjoys collecting insects and fishing.  


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Ben Thompson

The Importance of Trees to Our Lives and Landscapes

Ben Thompson is the Urban Forestry Specialist for the Washington State Department of Natural Resources’ Urban & Community Forestry Program and has been an ISA Certified Arborist since 1999. He holds a Bachelor’s degree in Urban and Community Forestry and a Master’s in Forest Resources and Conservation and has worked extensively with Washington’s trees and communities for over 11 years.

INSTRUCTORS: Friday, October 2 - Session Two: 2:30-3:45 pm

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Dr. Ani Jayakaran

Sustainable Stormwater Management and the Role that MGs Can Play

Dr. Anand Jayakaran is an Associate Professor with WSU Extension, with bachelor’s and master’s degrees in Civil Engineering, and a PhD in Agricultural & Biological Engineering. His role is to meet education and research needs in a region experiencing the impacts of high urbanization and a changing climate. His work involves disseminating strategies to manage water resources using Green Stormwater Infrastructure and improving current engineering designs, aiming to provide research-based solutions to stormwater managers.

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Dr. Troy Peters

Watering Systems: What Questions do YOU get in a Clinic? 

Dr. Troy Peters is a professor and Extension Irrigation Specialist at the Washington State University’s Irrigated Agriculture Research and Extension Center in Prosser, WA where he has been for over 13 years.  He is also a licensed professional agricultural engineer and a certified agricultural irrigation specialist.


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Christina Pfeiffer

Gardening Amid the Tree Roots

Christina Pfeiffer is a horticulture writer, educator, and consultant with 40 years’ experience in landscape management and plant care.  She brings an emphasis on sustainable garden practices applied in sync with the cycle of the seasons to her teaching and writing and holds degrees in horticulture from Michigan State and the University of Washington and is an ISA Certified Arborist©.  She is author, with Mary Robson, of Pacific Northwest Month-by-Month Gardening, 2017.

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Lenora Jones

Pesticides: WSU Master Gardener Policies and the Law

Lenora Jones works with the Washington State Pest Management Resource Service (WSPRS), a program in WSU's Department of Entomology. WSPRS provides guidance on WSU pesticide policy, maintains the University's pesticide research permit, and reviews WSU publications for legal pesticide recommendations. Prior to joining WSPRS Lenora wrote material for the Hortsense and Pestsense databases. was a WSU Master Gardener and Master Diagnostician, and has served as the WSU Puyallup Plant Clinic diagnostician.


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Kate Bratrude

Demo Gardens: Everything You Need to Know

Kate Bratrude is a WSU Master Gardener in Chelan/Douglas Counties and is Manager of the WSU Master Gardener Community Education Garden in Wenatchee and has enjoyed expanding the community education opportunities the garden provides.

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Jennifer Marquis

Demo Gardens: Everything You Need to Know

Jennifer Marquis is the statewide WSU Master Gardener Program Leader. She has been with Extension for 10 years and enjoys leading and empowering volunteers to accomplish program goals and objectives. Working with the WSU Master Gardener Program fulfills her passions for people and natural resources.  

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Bob Taylor

Demo Gardens: Everything You Need to Know

Bob Taylor has been a Master Gardener since 2001, serving as WSU Demonstration Garden Coordinator, Foundation member and part of the State MG Foundation Board. For the last 15 years Bob has expanded his involvement into Youth Outreach, teaching both Master Gardener and Master Recycling/Composting related topics. He is currently teaching 5 topics to Title one primary school students grades K-5.  . Bob received the Master Gardener of the Year Award in 2018.


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Don Krafft

A Convenient Truth - Composting for the Home Gardener

Don Krafft is a WSU Master Gardener and Master Composter in Island County , 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 pile at the South Whidbey Tilth Community Garden.

INSTRUCTORS: Friday, October 2 - Session Three 4:00-5:00 pm

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Mary Foster

Creating Garden Beauty All Year with Native Plants

Mary Foster is a longtime gardener who first because curious about the Master Gardener  program in the late 1980’s; and then in the early 1990’s, she and her husband were putting a garden in their new home and really appreciated the very helpful Master Gardener clinics in a local nursery.  Today, she is a Snohomish County Master Gardener and was awarded 2017 Intern of the Year. 

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Everett Chu

Planning a Water-Wise Garden: Design Principles for Everyone

Everett Chu is a Certified Professional Horticulturist, ecoPRO sustainable landscape professional, Master Gardener and registered member of the Association of Professional Landscape Designers.  He is the owner of Azusa Farm and Gardens in Mount Vernon and a landscape designer/builder for his business and garden creator in the Northwest Flower and Garden Show.  He has been a frequent garden writer for the Skagit Valley Herald and is a plant collector a regular speaker for garden clubs and horticultural programs, and serves on the steering committee for the ecoPRO certification.

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Carlene Boxman

Mixed Vegetable Crop Planning

Carlene Boxman became a Master Gardener in 2010. She volunteers her time working at the yearly MG plant sale overseeing the growing of vegetable starts for the sale and is architect of the vegetable raised beds at the Snohomish MG demonstration garden at Jennings Park in Marysville, WA. Carlene was honored by her peers as Master Gardener of the Year in 2016.

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Dr. Linda Chalker-Scott

Citizen Science - Enhancing Critical Thinking Skills

Dr. Linda Chalker-Scott has a Ph.D. in Horticulture and is an ISA certified arborist and ASCA consulting arborist.  She is WSU’s Extension Urban Horticulturist and an Associate Professor in the Department of Horticulture, and holds two affiliate associate professor positions at University of Washington. She conducts research in applied plant and soil sciences, publishing the results in scientific articles and university Extension fact sheets. Linda is an award winning author of 5 books including How Plants Work: The Science Behind the Amazing things Plants Do (2015), the horticultural myth-busting The Informed Gardener and an update of Art Kruckeberg’s Gardening with Native Plants of the Pacific Northwest (2019).


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Karen Chapman

Deer Resistant Garden Design

Karen Chapman  is the owner of Le jardinet, specializing in creating artistic plant combinations with a four-season foliage framework, functional outdoor living spaces, and deer resistant, summer-dry designs. Her articles and designs have been featured in many national gardening publications including Fine Gardening, Country Gardens, Sunset, and Garden Design magazines and Her latest book, Deer Resistant Design: Gardens that Thrive Despite the Deer was just released in 2019.

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Dave Pehling

If Bugs Could Talk …Gardening in Tune with Insect Lifecycles

Dave Pehling, retired WSU Extension Snohomish County zoologist/IT tech, joined WSU Extension in Snohomish County for a 6 month position in 1978 and remained until retirement 40+ years later.  He has a B.Sc. in zoology from the University of Washington and formerly taught about entomology and vertebrate pest management for the WSU Master Gardener and Livestock Advisor programs, as well as providing citizens with information about vertebrates, insects, native plants, plant diseases and pesticides.

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Sharon Collman

If Bugs Could Talk …Gardening in Tune with Insect Lifecycles

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 ID and insect appreciation and beneficial insects in the landscape throughout the PNW and in Canada and England.  She has authored over 75 publications and received numerous awards for her educational programs.

KEYNOTE SPEAKER: Friday Banquet, 6:00-8:00 pm

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Ron Gagliardo

Ron Gagliardo, Sr. Manager, Horticultural Services, Amazon.com