Buchu is like Rooibos one of the many plants forming the fynbos of South Africa's Western Cape, only growing here and is cultivated for its distinctive aroma and medicinal purposes.Only a tiny amount added dried Buchu leaves give the Rooibos tea some fresh taste and smell, perfectly to wake you up in the early morning. Buchu is like Rooibos one of the many plants forming the fynbos of South Africa’s Western Cape, only growing here and is cultivated for its distinctive aroma and medicinal purposes.