Add sour cream, mayonnaise, and buttermilk to a medium mixing bowl. Whisk until the mixture becomes smooth and creamy.
Add fresh dill, parsley, chives, lemon juice, garlic powder, onion powder, dried dill, salt, and black pepper.
Stir everything together until the herbs and seasonings are evenly distributed throughout the dip.
Taste the ranch dip and adjust the seasoning by adding more salt, lemon juice, herbs, or black pepper according to your preference.
Cover the bowl and refrigerate for at least 30 minutes to allow the flavors to blend and develop.
Before serving, give the dip a quick stir and add a splash of buttermilk if you prefer a thinner consistency.
Transfer the ranch dip to a serving bowl and serve chilled with vegetables, chips, crackers, or your favorite appetizers.