Rooibos (pronounced ROY-boss) is a naturally caffeine-free plant native exclusively to the Cederberg Mountain region of the Western Cape province of South Africa - a small, biologically unique area where the specific soil composition, altitude, and climate produce conditions that Aspalathus linearis, the rooibos plant, grows naturally and nowhere else on earth. Every cup of rooibos tea in the world comes from this single region.