The essential oil of Petit-grain is extracted from the leaves and the flowers of the orange tree, in the period in which the flowers have lost their petals and appear the small fruits of a pea size (petit grain). Therefore it is closely related to Neroli.
There is in fact a similarity between the aromas of two oils, even if that one of the Petit-grain is much more “earthy”. However, while Neroli wakes the mind to the highest spiritual or psychical levels, Petit-grain has more an affinity with reason and intellect. Use this oil when you need mental clarity.
Perfumes that contains Petit-grain essential oil: Sweet dreams