James Jiler combines an engaging personal account of running a highly successful horticultural vocation program at the largest jail complex in the United States with a practical guide to starting and managing prison and re-entry gardening programs. The Greenhouse Project gives horticultural job-training to male and female inmates at New York City's Rikers Island jail system. After release, ex-offenders can intern with the GreenTeam, which provides landscaping and gardening services to community groups and institutions throughout New York State. Jiler's humor and heartfelt stories about prison community and clear explanations of what works broaden this book's appeal to all social activists involved with at-risk populations.