Hornwort is an alchemy ingredient in The Witcher 3: Wild Hunt that is needed to craft the following items:
It can be found as random loot, gathered from plants, or purchased from the following merchants:
- All herbalists
- Gremist at Gedyneith
- Jonna in Rannvaig
- Keira Metz
- Merchant in the Fish Market in Novigrad
- The Pellar near Blackbough