ALL SEMINARS ARE FREE with your ticket. DIG IN and turn your garden dreams into reality!

Click on the map below to view a map of the Conference Center and all the Seminar Rooms.

Cass Turnbull

Founder, Plant Amnesty and author, Cass Turnbull’s Guide to Pruning

Cass Turnbull has been a professional gardener for over 30 years, first as an employee of the Seattle Parks Department and then as owner of a garden maintenance and renovation business. She is also founder and president of a 27 year old, 1,000 member non-profit group called PlantAmnesty. PlantAmnesty’s mission is “to end the senseless torture and mutilation of trees and shrub caused by mal-pruning.” Cass is a veteran Master Gardener, an ISA Certified Arborist, and has taught over a thousand pruning classes in Seattle and across the country. She is the author of Cass Turnbull’s Guide to Pruning, 3rd Edition: What, When, Where, and How to Prune for a More Beautiful Garden (Sasquatch, 2012). Using a combination of humor and controversy, PlantAmnesty has reduced the incidence of tree topping in Seattle by 90%. For her work she and PlantAmnesty have won many awards including the National Arbor Day Foundation education award, three Gold Leaf Awards from the International Society of Arboriculture and Seattle’s Friend of the Trees Award.


Garden 101: The Best Damn Garden Advice Ever!

Tools and Tips to Make Gardening Life Easier

Plants die. Weeds won’t die. Your “home remedies” make things worse. You keep repeating the same chores—but want better results! Never fear—Cass Turnbull, Mary-Kate Mackey and Linda Chalker-Scott are coming to your rescue! Cass covers useful tools, actions to save your body, and unnecessary chores to jettison. Mary-Kate presents a collection of tough Northwest survivors that will carry on despite the challenges you throw at them. And Linda will discuss those infamous “home remedies,” suggesting alternatives to use that will actually be beneficial.

Thursday, Feb 23 at 2:45 pm / Rainier Room / Book signing to follow