The onion to plant if you always want onions. Egyptian Walking Onions grow perennially in beds. The hardy bulbs set bulblets on stalks. Air-bound bulblets will sprout new smaller stalks, which fall over and replant themselves, hence the name Walking. Bulbs can be harvested over the fall and winter. Green onions can be harvested selectively as they grow. Plant them where you intend to have them for a long time, as they are quite hardy. They tend not to yield very much the first year, but after that they will keep you supplied with onions.