Black Jack Fast version is an F1 photo-period hybrid strain that was created by bringing together a specially selected S.A.D. Auto (Sweet Afghan Delicious Auto) with the elite Jack Herer clone that had been used in the production of the original Black Jack.
Jack 47 Fast version is an F1 version of the original Jack 47. It was created by crossing an elite clone of the original photo-period strain with its own auto-flowering version. The resulting strain maintains its photo-period property but with a shorter period of florescence for those in a hurry.
