Like grapes grown for fine wine, onions also respond to soil qualities, sunlight, and the latitude and longitude of their growing region. The rich volcanic soils and dry climate in this area produce some of the finest onions in the world, giving them a unique combination of mild flavor, large size, and tight, dry skins. Our growers plant yellow, red, and white varieties of sweet Spanish seed. Sometimes these onions are also called “Spanish Onions” or “Spanish Sweets.” The crop is planted in Mar…