Kratom: Where does this magical plant come from? Dutch colonial botanist Pieter Willem Korthals first documented the Kratom tree originating in Thailand. It was discovered in the 19th century, but the current crop and uses of the Kratom date back much longer. Thais have used it from thousand … October 1, 2018December 1, 2018. Categories: Health. Tags: Kratom, magical, plant.