Identify how you’re using dill weed: finishing fresh, simmering in a sauce, or baking into a batter.
Choose the closest dill-leaning option: fresh/dried dill first, then fennel fronds for the same bright herb vibe.
Measure using the listed ratio; if your substitute is stronger (like tarragon), use the smaller ratio to avoid overpowering.
For cooked applications, add the substitute earlier so it can mellow; for finishing, add near the end to preserve aroma.
Taste and adjust with salt or acid (lemon/vinegar) to recreate dill’s “lift” effect in the finished dish.