J1 also known as "Jack 1", this flower is a high-end sativa hybrid weed strain that is gaining widespread popularity. J1 is a cross between two famous sativas Skunk #1 and Jack Herer and is best known for its strong, uplifting, and clear-headed buzz that allows for extra mobility. The flowers are emerald green and frosty with a sweet aroma resembling the unmistakable Jack Herer pungency.