Ed Rosenthal, California horticulturist, author, publisher, and Cannabis grower known for his advocacy for the legalization of marijuana use. He served as a columnist for High Times Magazine during the 1980s and 1990s, discusses his best-practices for commercial cultivation. Ed speaks with the GroAdvisor team about the early days of cannabis cultivation, differences in growing large-scale and small-scale, 5 quick-tips for commercial cultivators, and considerations when choosing commercial grow equipment. Ed Rosenthal’s Marijuana Grower’s Handbook has become the definitive marijuana cultivation resource, inspiring millions to learn the best marijuana cultivation techniques. His book is the official course book of Oaksterdam University.