Blueberry Train Mac name comes from three strains---Blueberry, Trainwreck, and The Mac---in a delicate breeding process called a Three-Way Braid. A Three-Way Braid is a multi-year process of selective breeding through back-and-forth cross-pollunation of three strains. It took the breeder Capulator four years to achieve his goal in Blueberry Train Mac. Its a strain with a terpinolene flavor with a blueberry ending, but with a frosty look on the bud typical of a Mac descendant.‍