Rooibos tea, like most herbal ones, requires the highest temperature to brew when compared with the other types of tea. The recommended brewing temperature for rooibos is between 200°F and 212°F. Manufacturers, in some cases, indicate the heat that the tea is to be exposed to, as is the case with Rishi Tea Organic Blueberry Rooibos, which is to be brewed at 195°F for the best taste and flavor. Check the website of the brand acquired to see if the best temperature has been listed before using the recommended one.