Dill weed and dill seed, from the same plant, are popular seasonings. Although the flavor is similar, dill seed is stronger and is therefore used in pickles and other strong-flavored dishes. Dill weed, which is more delicate, is used as a more subtle seasoning. Dill seed is useful for seasoning some vegetable dishes and to flavor soups, stews, cheese and egg dishes. A primary ingredient in pickling spice.