Ed Rosenthal “Guru of Ganja”


Ed Rosenthal is recognized worldwide as a leading authority on marijuana. In his 30-plus years as America’s “guru of ganja,” he has written or edited more than a dozen books about marijuana cultivation and social policy that cumulatively have sold over one million.  

Cannabis Business University’s Medical Marijuana Educational Series of Hawaii is proud to present The Guru of Ganja™ “Let’s Get Growing” with Ed Rosenthal, cultivation expert, Dr Charlie Webb and organizations Green Aid, Patients Without Time Hawaii on September 25th at the Sheraton Hotel Kona, Hawaii, sponsored by Cloud 9 Emporium.

His first book, Marijuana Grower’s Guide, is the only title on marijuana cultivation to be reviewed by The New York Times Book Review. After almost two decades, his Ask EdTM advice column continues to answer questions on all matters of marijuana from readers around the world.

Rosenthal was one of the original American writers to travel to Holland, bringing European knowledge and sophistication about cannabis to the states through his books and columns. He has visited countless marijuana gardens, gathering information about breeding and cultivating and sharing the most effective techniques. He is a member of the International Cannabis Research Society and the Garden Writers Association of America, and has served as an expert witness on marijuana cultivation in federal and state trials. Rosenthal has also been active in promoting and developing policies of civil regulation for marijuana, advising California legislators and working on local and national political campaigns. He predicts that by the year 2012, marijuana will be regulated in the U.S. in the same manner as tobacco and alcohol.  

Also by Ed Rosenthal

Marijuana Growers Handbook
The Best of Ask Ed
Marijuana Growing Tips
Easy Marijuana Gardening
Closet Cultivator
Marijuana Medical Handbook
Marijuana Question? Ask Ed
Ask Ed: Marijuana Law
Why Marijuana Should be Legal
, by Ed Rosenthal & Steve Kubby
Hemp Today, Ed Rosenthal, Editor


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