XJ-13 is the cultivar that built THC Design and originally it was what we were known for. A cross between Jack Herer and G13 Haze XJ-13 is a Sativa-dominant flower that balances high levels of THC with Terpinolene Caryophyllene and Ocimene terpenes making it a great choice for daytime productivity without the raciness that is found in a lot of Sativa-leaning strains. Physical Effects : Soaring cerebral euphoric. Flavor : This cultivar is fresh with uplifting notes of lemon tangerine and pine.