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.