Feathery green fronds with a sweet, grassy, faintly aniseed aroma carried by carvone — the same compound that dominates caraway.
What it does in a recipe: A cool, sharp finish for fish, cucumber, yoghurt and potatoes, added late because its oils are volatile and heat-sensitive. Pick the swap that covers that job — the ratios below are written so you can act on them without doing any arithmetic.
Dill seed and dill weed are not interchangeable. The seed is far more pungent and closer to caraway, and belongs in pickling brine rather than on a plate of salmon.
Cooking around an allergy? Diet tags here describe the ingredient itself, not any particular brand. Processed products change formulation without notice and shared production lines are common, so read the label on everything you use. A severe allergy is a medical matter — confirm with the manufacturer or your clinician rather than relying on a substitution chart.