Knotgrass is a plant with magical proprieties. It is used in potion-making, being an essencial ingredient of the Polyjuice Potion and in the brewing of alcoholic beverages such as Knotgrass Mead.
Appearances
- Harry Potter and the Chamber of Secrets
- Harry Potter and the Chamber of Secrets (film) (Mentioned only)
- Harry Potter and the Chamber of Secrets (video game)
- Harry Potter and the Goblet of Fire (Mentioned only)
- The Wizarding World of Harry Potter (Mentioned on a bottle)