In this groundbreaking book, Dr Owen Johnson of the Tree Register of the British Isles (TROBI) reveals how generations of adventurous gardeners have transformed Britain and Ireland into one gigantic arboretum: a collection of specimen trees gathered from all around the world. The book reveals the use of native trees and their colourful sports in garden design, the story of gardening with exotic trees as it has unfolded over the last five centuries, and the ongoing role of botanic gardens in the conservation of tree species endangered in the wild. Arboretum is both a celebration of Britain and Ireland's extraordinary tree heritage and a passionate plea for this unique legacy to be appreciated and safeguarded in the way it deserves. This very attractive book, packed full of photographs, makes the perfect gift for all lovers of our countryside.