J1 also known as "Jack One " "Jack 1 " and "J-1 " is a high-end sativa hybrid weed strain that is gaining widespread popularity. J1 is a cross between two famous Sativa's Skunk #1 and Jack Herer and is best known for its strong uplifting 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. This strain's seemingly only flaw is the top-shelf price that tends to come with its exceptional quality.