Ed Rosenthal is the world's leading expert on the cultivation of marijuana. In his more than forty years as the "guru of ganja," he has written and edited over a dozen books about marijuana cultivation and social policy that cumulatively have sold over two million copies. His "Ask Ed" marijuana advice column ran in High Times for several decades and still appears internationally. Beyond the garden, Rosenthal views marijuana law as a crucial social issue and has been active in promoting and developing policies of civil regulation. He lives in Oakland, CA.

David Downs is an award-winning journalist covering arts, technology, and criminal justice for publications including WIRED, Rolling Stone, The Onion, and The New York Times. Downs was a fellow at Northwestern University's Academy for Alternative Journalism in 2004, and he earned a degree in English literature from the University of California at Santa Barbara in 2002. He has received and shared numerous professional honors, including a 2010 Knight-Batten Award for Innovations in Journalism. He produces and hosts the podcast The Hash. He lives in San Francisco with his wife and son.

Review Quotes:

" Marijuana Harvest, co-authored by San Francisco Chronicle Cannabis Editor and former Cannabis Now Senior Editor David Downs, is the latest offering in a long legacy of cultivation books released by Rosenthal. And although the 'guru of ganja' has been publicly pushing for homegrown backyard cannabis since the late '70s, Marijuana Harvest arrives at an optimal time when more Americans than ever before have the ability to grow and cultivate marijuana for medical and personal use. The book offers techniques designed to increase the quality and yield of homegrown flowers and pulls from years of research, controlled experiments and interviews with cannabis cultivators on what has worked so far. Marijuana Harvest is designed to teach marijuana growers of all scales how to avoid making costly mistakes, identify problems and solve them quickly and is full of options to jump in on the fun of developing the science around the world's favorite flower with further personal innovation."
--Ellen Holland, Cannabis Now Magazine

"The information given could well save an inexperienced gardener more than the purchase price of the book in a single harvest, and it makes some points of value for even a seasoned grower."
--Grubbycup, Hydrolife Magazine

"Anyone with any clout in the cannabis industry recognizes the name, Ed Rosenthal. Now, right in time for harvest season, Ed brings us a new book explaining exactly how the best farmers do it. In Marijuana Harvest, Rosenthal once again collaborates with David Downs, Cannabis Editor for the San Francisco Chronicle. From the ins-and-outs of chopping down stalks to the extraction methods many growers use, the authors cover the entire spectrum of what happens to cannabis flowers once they are fully developed. Marijuana Harvest is a delightful read--equally informative as it is visually pleasing. We definitely recommend this book to anyone interested in cannabis cultivation. Getting the most out of our bud doesn't stop with the growth cycle. Flowers must be treated with care until the moment they are sold over the counter. Thankfully, Rosenthal and Downs have made this book available just in time to show us how important harvest can be."
--Cara Wietstock, Terpenes and Testing Magazine

Publisher Marketing:

Marijuana Harvest is the first book devoted entirely to cannabis harvesting. In it, Ed Rosenthal and David Downs explain how to ensure the perfect harvest--everything from recognizing when it's time to pick, to storage techniques to keep your buds fresh.

Marijuana Harvest is the most important cultivation tool of the season. Readers will learn:

  • Flushing: How and when to flush
  • Ripening: The best time to pick
  • Manicuring and processing: How to speed it up with new tools for both hand and machine trimming
  • Drying and curing: How to avoid mildew and mold contamination
  • Storing: How to keep your buds fresh and potent


Whether you are a hobby gardener or commercial farmer, Marijuana Harvest shows you how to maximize the yield and quality of your garden, identify problems and avoid costly mistakes. The book's stunning, full-color photographs and illustrations make it an attractive guide to the steps needed to harvest, dry, trim, cure and store top-quality buds.


Internationally recognized as the number one cultivation author, Ed Rosenthal, along with renowned journalist David Downs, thoroughly researched this book, visiting personal gardens and commercial farms to observe techniques used as well as experimental methods under development. Winners of prestigious cannabis cups are interviewed and share their tips and advice. Content includes time-, labor-, and energy-saving tools and equipment: trimmers, climate controls, drying methods, storage systems, workflow charts and much more--everything a grower needs to know to do it right.

Cut through the clutter of online forums and anecdotal advice to find out how to grow and harvest top-shelf buds, both indoors and out, for use as dried flowers, extracts and edibles. For the casual consumer there are tips on how to choose the best-grown and best-tasting buds available. Marijuana Harvest is an accessible and informative look at harvest methods for all marijuana users and growers.



  • Paperback: 256 pages
  • Publisher: Quick American Archives; Illustrated edition (30 September 2017)
  • ISBN-10: 1936807254
  • ISBN-13: 978-1936807253
  • Product Dimensions: 15.2 x 1.8 x 22.6 cm

Marijuana Harvest: How to Maximize Quality and Yield in Your Cannabis Garden