The Yerba mate plant is grown and processed in South America , specifically in northern Argentina ( Corrientes , Misiones ) , Paraguay , Uruguay and southern Brazil ( Rio Grande do Sul , Santa Catarina , Paraná and Mato Grosso do Sul ) .
The plant is grown mainly in South America , more specifically in Northern Argentina ( Corrientes , Misiones ) , Paraguay , Uruguay and southern Brazil ( Rio Grande do Sul , Santa Catarina and Paraná ) .