Pu-erh tea

„Poor control in fermentation/oxidation process can result in bad ripened pu'er, characterized by badly decomposed leaves and an aroma and texture reminiscent of compost.“

„In some ways, by doing so you’re basically cupping the tea without cupping it – you’re testing whether or not the tea is good for your style of brewing. Even then, however, a good tea drinker should be adjusting to the tea and trying to brew it as best s/he can, which means that the first try can come out horribly wrong.“