5. Tropical Climate Characteristics The Ka’a He’ê grows wild, with characteristics only possibles within the department of Concepcion and Amambay at 720 meters over sea level and an average temperature of 23º C, rain falling average of 1.600 milímeters and abundant humidity during summer. Moises Bertoni “ Stevia Rebaudiana (Bertoni) , is native to northeastern Paraguay (23°- 24° latitude South) and has been used for centuries as a natural sweetener, particularly in infusions of Mate” SOEJARTO et al. 1983; LEWIS. 1992