"Egyptian Onions are perennials that multiply by creating small bulbs at the top of a leaf stalk, each of which can grow into a parent plant.  The onions are also known as Walking Onions, since if you leave them alone, the stalks will bend down and plant new onions nearby.  As long as you don't overharvest your onions, you will find them to be a dependable source of green onions and leek-like bulbs for about 9 months out of the year, making them a great way to eat in season." - Todd Hoff from Bookmarklet