The Grower’s Handbook, written by the Garden Sage, is a concise grow guide that is direct and to the point. It specializes in high-energy plants that produce fruit and flowers and is available in both print and digital formats in English and Spanish. The book’s author David Robinson has been guiding gardeners to their greatest successes for over 15 years. Working full-time on the retail ﬂoors of busy hydroponic stores has allowed him to deal with wide variety of challenging situations. Highly sought out for his valued consultation, the Garden Sage has improved countless yields and directed the set-up of thousands of different gardens. By being on the front lines of the hydroponic revolution, the Garden Sage has helped many growers to build and perfect their systems and has had the advantage of getting feedback from thousands of growers or all levels. The Grower’s Handbook is available at select hydroponic retail stores and through thegardensage.com and thegrowershandbook.com. It is also available as wholesale through Green Planet Nutrients, Left Coast Wholesale and Great Lakes Wholesale.