Cass Turnbull has been a professional gardener for 20 years. After seeing so many ruined trees and shrubs in her clients' gardens, she founded PlantAmnesty with the mission to teach gardeners (and so-called professional arborists) about the particulars of proper pruning. She has long been the humorous voice of PlantAmnesty through their regular newsletter. She lives in Seattle and lectures around the country on pruning.
