Onion Seeds

Onion Seeds at £0.99. Ailsa Craig-show variety, Summer Isle, Long de Florence Simane, Spring Onion Seeds. Red Onion Seeds. Onion is a term used for many plants in the genus Allium. They are known by the common name "onion" but, used without qualifiers, it usually refers to Allium cepa. Allium cepa is also known as the "garden onion" or "bulb" onion. It is grown underground by the plant as a vertical shoot that is used for food storage, leading to the possibility of confusion with a tuber, which it is not.