Black Jack is a marijuana strain that produces hard buds with huge, grape-like calyxes that are completely encrusted with THC. The taste is heavy and flavorful and the strain produces exceptionally long-lasting effects. Because of its high THC levels, Black Jack is popular among medical marijuana patients. ** All prices include a 15% CA Excise Tax, Oakland Local Tax (since we are licensed out of Oakland), and your local Sales Tax!