Ghost Train Haze is one of the most intense strains that has ever been introduced to the marijuana universe. This strain is not for the novice Toker; after all, Ghost Train Haze was named the "Most Potent Strain on earth" by High Times magazine in 2012. This strain derives from Ghost OG & Neville's wreck, creating an insane 27% THC level. GTH is mainly sativa (80:20 sativa/indica ratio), so if you are a novice smoker or suffer from anxiety, it is best that you steer clear of this wicked strain.