Leeks are like delicate onions. They add their rich but subtle flavor to everything from creamy sauces to soups and stews. They're a must for any food enthusiast's garden. The best place for growing Leeks is in full sun in fertile, well-drained soil. When planting Leeks in the garden, make a shallow trench (about 4-5 in. deep) and place the plants inside, spacing about 6 in. apart and covering with only a light amount of soil. This frost-hardy plant can be harvested long after many other garden vegetables.