This section is from the book "Commercial Gardening Vol4", by John Weathers (the Editor). Also available from Amazon: Commercial Gardening, A Practical & Scientific Treatise For Market Gardeners.
This bulbous-rooted European perennial is grown for its slender fistular grass-like leaves, which are used in salads and soups, having a milder flavour than onions. It has clusters of pretty violet-red flowers, and flourishes in any good soil. Easily increased by division in March or April every second or third year.