Cashews grow on cashew trees and the places that produce large amounts of cashews are India, Brazil, Vietnam, Africa, and Southeast Asia. The cashew tree blooms with lovely pink flowers which drop off as the cashew apple begins to grow. The cashew apple is the swollen stem of the fruit of the cashew tree. At the bottom of the cashew apple there is a kidney shaped shell attached. This shell contains the cashew nut. The shell also contains a liquid that is very caustic and can burn you. A person who wishes to process cashew nuts needs to exercise care because of this liquid.