Bourbon geranium is rose geranium from Reunion Island (formerly Bourbon), considered the world's finest, with exceptional rosy-green freshness and minty depth. The island's volcanic soil and climate produce oil of remarkable quality. In perfumery it is the premium choice for fougeres and aromatic compositions. In Indian summers, Bourbon geranium's superior freshness is noticeable, staying crisp where lesser oils turn flat. The connoisseur's geranium.