Dill weed and dill seed come from the same annual herb. The leaves of dill, shown on the lower half of the picture above, look like twigs or stems less than 1/2 inch long. The leaves are called dill or dill weed. Use dill weed to flavor chicken or fish, in soups or dips, or to flavor olive oil for dressing.
The yellow blooms of the dill plant eventually fade and dry to form seeds shown at right. Dill seeds are less than 1/4 inch long. Use dill seed to flavor pickles, meat, bread or in place of caraway seeds such as in sauerkraut.