Dill has a dominant personality and a well-rounded tang. The Dill Seed flavor is clean, pungent, and reminiscent of caraway. Dill Weed has a similar but mellower and fresher flavor. Stronger tasting than the leaves, seeds are used whole or ground in longer-cooking recipes.
Dill Seed and Dill Weed are not good substitutions for each other. The seed has a camphorous, slightly bitter flavor, and the weed has a delicate flavor. Dill Seed is good sprinkled over casseroles before baking and used in salad dressings. Dill Weed, with its delicate flavor, enhances fish, shellfish, vegatables, and dips.