Our favorite onion by far is now on sale! This perennial onion is simply amazing as each onion will grow a thick edible stalk that is so tasty that our kids literally walk around the garden eating them! The stalks are much bigger and thicker than a traditional chive but can be enjoyed much the same way. We eat them fresh as well as cook with them. As the plant grows it will eventually grow a cluster of new bulbs at the top of the plant. These bulbs will get heavy and cause the stalk to bend toward the ground; therefore replanting an entire new cluster of plants (hence the name "walking onion".
3 years ago we planted our first 50 bulbs in the ground and while enjoying as many chive stalks as we possibly could, we easily turned them into thousands of plants. While they could potentially spread all by themselves, they are extremely easy to manage as you simply cut the bulbs from the top when the stalks begin to bend and either replant where you want or eat them!
As an added bonus we are able to harvest the chive like stalks almost year round. The plants are very cold hardy and don't seem to be bothered by our mild winters here in zone 7. This is a must have in every garden.