Vegetable leeks are nutritious and rich in vitamin C, which is widely used in Iranian cuisine Leek seeds can be planted in spring and winter and in general in warm and temperate climates. The planting depth of this plant is 1 cm and the plant should be cut at a distance of 2 cm from the soil surface Leek leaves can be used in many cases. At first, these leaves are small and thicken after a few cuts.