The Yerba mate plant is grown and processed in South America, specifically in northern Argentina (Corrientes, Misiones), Brazil, Paraguay and Uruguay. Cultivators are known as yerbateros (Spanish) or ervamateiros (Portuguese). | The Yerba mate plant is grown and processed in South America, specifically in northern Argentina (Corrientes, Misiones), Brazil, Paraguay and Uruguay. Cultivators are known as yerbateros (Spanish) or ervamateiros (Portuguese). |