Grown only in a small area in the Cederberg region of the Western Cape province, South African Red Bush (popularly known as rooibos) is a naturally caffeine-free tisane. Rooibos is growing in popularity both in the US and the EU due to its purportedly high levels of antioxidants, naturally sweet character and nutty flavor notes and being naturally caffeine-free. It is remarkably refreshing night or day, hot or iced.