In the last decade Petunia hybrida has emerged as the model of choice to study volatile benzenoid and phenylpropanoid synthesis, emission and regulation. These volatiles are synthesized predominantly in the corolla limb and emission is highly regulated, with a circadian rhythm, during corolla development, pollination and senescence. With all the biochemical and molecular tools available, much of our understanding of volatile benzenoids/phenylpropanoids has been obtained with Petunia, as illustrated in this chapter.