Who knew cashews were such a complicated nut?! Originating in Brazil, the cashew migrated to India via Portuguese sailing ships in the mid-14th Century. Cashew trees need a tropical environment to flourish, 90% of cashews come from Brazil, India, Vietnam and Nigeria. Germany and the United States are the top importers of this nut. Most fruits have their seeds inside the flesh of the fruit. In the case of the cashew tree, the.