Jack Flash was created by the cannabis breeder Sensi Seeds, which set out to improve on the legendary Jack Herer by creating a hybrid that combined these powerful genes with the highly sought-after growing attributes of a Skunk. In this case, the breeder mixed Jack Herer female with Sensi’s Super Skunk and Haze to produce trichome-rich buds, high THC, and low CBD, according to Amsterdam Seed Center.