This fully updated guide by Greg Green explores the art and science of growing cannabis, offering cutting-edge techniques and the latest advancements in the field. The fourth edition covers everything from strain selection and optimising environments to advanced lighting and extraction methods. With over 1,500 photos and 50 photo essays, it clearly details every step of the growing process with step-by-step photographs, offering an easy, user-friendly approach to beginner and experienced growers. The guide also includes organic, hydroponic, aeroponic, and soil grows, with eco-friendly tips for reducing your carbon footprint. With over 500,000 copies sold, this essential guide to cannabis cultivation is better than ever.