Sub Zero, also called Sub Zero #12, is a hybrid cannabis strain bred from a genetic cross of Super Boof x Oreoz; the breeder of Sub Zero is GrowMoreFire Genetics. Sub Zero is freezing with frost—a thick, white coat of trichomes covers these medium-stretch plants that bloom with blocky, deep purple buds. Sub Zero produces high yields, and often tests at over 22% THC. Consumers can expect euphoric effects and a palate of fruity, citrus, and sweet flavors.