Many food historians believe onions originated in Asia. Other research shows onions first grown in Iran and Pakistan. Green onions, are also known as spring onions and scallions. The flavor is mild, and the entire onion is used except the root.
Onions have been cultivated for 5000 years or longer. In various regions, onions grew wild. Onions less perishable than other food of the time. Easy to transport and easy to grow. They grow in a variety of soil and climate.