ack Herer, also known as "JH," "The Jack," "Premium Jack," and "Platinum Jack" is a sativa-dominant marijuana strain that has gained as much renown as its namesake, the marijuana activist and author of The Emperor Wears No Clothes. Combining a Haze hybrid with a Northern Lights #5 and Shiva Skunk cross, Sensi Seeds created Jack Herer hoping to capture both cerebral elevation and heavy resin production. Its rich genetic background gives rise to several different variations of Jack Herer, each phenotype bearing its own unique features and effects. Leafly reviewers tell us that Jack Herer’s effects include feeling energetic, creative, and uplifted. However, consumers typically describe this 55% sativa hybrid as blissful, clear-headed, and creative.