Some content in this article is derived from information featured in Harry Potter and the Cursed Child, and, as such, spoilers will be present.
- "I don't understand that bit about the garlic, do they have to eat it or...?"
- —Neville to Harry about vampires and garlic
Garlic is a plant related to the onion, used as a food substance and for medicinal purposes. It's also used to ward off Dark creatures. In particular, vampires are known to be averse to the plant, as it can be fatal to them if ingested in large quantities.
Fred and George Weasley were known to brandish cloves of garlic at Harry Potter during the 1992-1993 school year to poke fun at the fact that many of the students believed him to be the Heir of Slytherin.
In the 1993-1994 school year, during a chance meeting at the statue in front of the One-Eyed Witch Passage, Neville Longbottom discussed a essay on vampires assigned by Professor Lupin with Harry Potter. He stated that he did not understand "that thing about the garlic" at all, wondering if they had to eat it.
- Harry Potter and the Philosopher's Stone (Mentioned only)
- Harry Potter and the Philosopher's Stone (video game) (GBC version)
- Harry Potter and the Chamber of Secrets
- Harry Potter and the Chamber of Secrets (video game) (GBC version)
- Harry Potter and the Prisoner of Azkaban (Mentioned only)
- Harry Potter and the Order of the Phoenix (film) (Mentioned only)
- Harry Potter and the Cursed Child (Mentioned only)
- Harry Potter and the Cursed Child (play) (Mentioned only)