Bred by Sweet Seeds, Black Jack is a cross of Black Domina and Jack Herer. This strain produces thick buds with huge calyxes that are completely encrusted with trichomes. It has a heavy and flavorful taste and it produces exceptionally long-lasting effects. Because of its high THC levels, Black Jack is popular among medical marijuana patients. Flavors Pungent Earthy Sweet Citrus Pine Effects & flavors are reported by users on our site. This is for informational purposes only and not intended as medical advice. Please consult your physician before changing any medical treatment.