Allium proliferum - The Tree or Walking Onion. One of the first plants to emerge in the spring, these aren't the big & round globes you think of as onions, but much smaller orbs with the double bonus of smaller bulblets on top of stems in clusters, like a freaky flower-head. Usually you eat the lower bulbs and plant the bulblets for more onions. Hardy herbaceous perennial, Gets its name from the way it moves around the garden by falling over and re-seeding. Priced for a 1 litre pot