Pearl Pharma's original Jack Herer. Jack Herer, also known as "JH," "The Jack," "Premium Jack," and "Platinum Jack" is a sativa-dominant marijuana strain.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.