Home to some of the most rugged terrain on earth, Borneo, Indonesia is one of the largest producers of kratom in the world, and for good reason; The temperature and moisture comes rich biodiversity on the island, leads to incredible cultivation conditions for red Borneo kratom, green Borneo kratom, white Borneo kratom, and yellow Borneo kratom. So when you’re looking at the different strains of kratom for sale, make sure to include Borneo kratom on your list.