<p>A federal jury Friday found Ed Rosenthal, the author of how-to-grow books on marijuana and how to avoid the law, guilty of marijuana cultivation and conspiracy charges.</p>
<p>Deliberating for a day, the 12-member jury concluded that Rosenthal, the self described "Guru of Ganja," was growing more than 1,000 plants, conspiring to cultivate marijuana and maintaining a warehouse for a growing operation. He faces a maximum life term when sentenced June 4.</p>