Nether wart spawns naturally only in specific structures in the Nether: mainly nether fortresses and certain bastion remnants.

Quick Scoop: Where does nether wart spawn?

  • In nether fortresses
    • Look for small “gardens” of soul sand at the base of interior staircases, usually with red nether wart growing on top.
* It can also appear in fortress chests as loot if a fortress generates without a wart garden.
  • In bastion remnants
    • Specifically in piglin housing unit bastions, you’ll find patches of soul sand with nether wart in the central courtyard area.
  • Only in the Nether
    • Nether wart does not spawn naturally in the Overworld or End; you must go to the Nether at least once to get it.

After you find it

  • Planting:
    • Can only be planted on soul sand , not soul soil.
  • Where it can grow:
    • Once planted, it can grow in any dimension (Overworld, Nether, End) as long as it’s on soul sand.

Think of it like a rare magical crop: you brave the Nether once, grab a few warts from a fortress or bastion, then set up a big farm safely back home on soul sand.

TL;DR:
Nether wart spawns in soul sand gardens inside nether fortresses (near staircases) and in piglin housing bastion courtyards, only in the Nether; then you can farm it on soul sand anywhere.

Information gathered from public forums or data available on the internet and portrayed here.