Historically popcorn was only grown in the United States. Today popcorn is grown all over the world. While the majority is still grown in the United States a significant amount is now produced in Argentina, Australia, South Africa, Ukraine, and many of the European countries. Popcorn may be grown wherever other hybrids of corn are grown. One of the largest contributors to popcorn quality is the processing that the corn is subjected to after the corn is picked. In this area the United States processors usually have more experience than those in other parts of the world.