This bulberous perennial plant forms an upright habit with circular hollow white stems. The long lanced-shaped leaves are blue green and the pinkish flowers are held above the foliage in a globular cluster from spring to summer.

Hardiness zones 5 to 10 

Allium porrum natural origin is uncertain but generally appeared in Europe. It prefers a well drained fertile moist soils in an open sunny position. 

Leak is a perennial that is grown for culinary use and is planted in vegetable or herb gardens. It may also be grown in pots or planter boxes, roof gardens or on balconies. It establishes from a seed in 3 months but is short lived. The crushed leaves may relieve the pain of insect bites and leek is high in vitamin C. The plant is closely related to Onions but tolerates a wider range of climate conditions and grows faster. ID 1939

Note:
The slightly protruding bulb consists of membranous scales. 

Allium (Ă-lee-um) porrum (poor-rūm)

Alliaceae  (AH-lee- AY-see-ee)
Onion family