Leeks have a wider adaptability to temperature than other onions and garlic vegetables. Leek is a cold-tolerant vegetable. The suitable temperature for its leaves to grow is 15 to 25°C. It can also grow at 10 to 15°C. The leaves can withstand low temperatures of -4 to -5°C, but are not resistant to high temperatures and can grow above 25°C. Slow, growth is blocked above 30°C. The requirements for light are weaker than onions. If the light is too strong, there will be more fiber and the quality will be poor. If the light is too weak, the yield will decrease. Leeks are shallow-rooted plants that require high soil moisture, preferably with a moisture content of 80 to 95%. However, their leaves are narrow and waxy and can adapt to low air humidity. It requires loose and fertile soil with sufficient supply of fertilizer and water, which can promote the growth of tillers and leaves and is beneficial to increase production.