They are grown in temperate and humid climates. Their season starts in early autumn and ends in spring, so they can be classified into summer leeks and autumn or winter leeks.

They contain a lot of water, fiber, carbohydrates and are low in calories. They also contain vitamins A, C and B6, minerals such as potassium, calcium, phosphorus, sodium and iron and are beneficial for the digestive system and pancreas, during pregnancy, promote intestinal transit, strengthen the immune system, increase defenses, are diuretics and laxatives, stimulate appetite and prevent cardiovascular and degenerative diseases. They also prevent cholesterol, purify the blood, promote nerve and muscle impulse and help fight arthritis and rheumatism

They are consumed in purees, soups, stews, stews, roasts, in potages, etc.