Nether Wart is a plant found in the Nether dimension of the game Minecraft. It grows in soul sand and is essential for brewing potions. Players can find it in fortress structures, where it often grows in patches. To cultivate Nether Wart, players need to plant it on soul sand blocks. It takes time to grow, and once fully matured, it can be harvested for use in potion-making. This plant is crucial for creating various potions, including those that grant effects like healing and strength.