Gardening Confidential takes us on aninternational exploration of one of the most obsessive hobbies in human history, and discovers some surprising modern twists. From robotic lawnmowers to gardens on Mars, from trendy Manhattan rooftops to virtual gardens in cyberspace, this ancient craft has entered the space age and become a multi-billion dollar industry. Meet some of the most single-minded gardeners in the world and discover how gardening can get you in trouble with the law.