Fresh pacific northwest peppermint. caffeine free. we search the world for the best teas, herbs, coffees and spices, and the only u.s.-grown crop that ranks as the very best in these categories is peppermint. our peppermint is grown in the pacific northwestern states of oregon and washington, and has an intensely minty quality. peet's herbals offer a flavorful cup without the caffeine.. (per 8oz) 10.90