Nether Fortress Navigation and Resources

Key Takeaways

Point	Details
Nether fortresses generate in	Nether fortresses generate in 432×432 block regions (Java) or 480×480 (Bedrock); each region can hold either a fortress or a bastion, not both.
In Java Edition, there	In Java Edition, there is a 40% chance a fortress generates instead of a bastion; in Bedrock, it's 33.3%. Fortresses are most common in basalt deltas.
Blaze spawners appear on	Blaze spawners appear on up to two exterior platforms, each with a fenced platform and a spawner in the center.
Nether wart is found	Nether wart is found in soul sand gardens around stairwells and in chests; it can only be planted on soul sand and grows to maturity in about 34 minutes.
Wart is essential for	Wart is essential for brewing awkward potions, the base for almost all potions.

Nether fortresses are critical for any player aiming to brew potions or collect blaze rods. Here is everything you need to know to find and navigate them efficiently.

How Nether Fortresses Generate

The game divides the Nether into grid regions. In Java Edition, these regions are 432×432 blocks; in Bedrock Edition, they are 480×480 blocks. Each region can contain either a Nether fortress or a bastion remnant, but never both. The actual buildable area within a region is smaller: 368×368 blocks in Java and 416×416 blocks in Bedrock, because a four-chunk separation along the south and east borders prevents structure placement there.

The regions are 432×432 blocks in Java Edition and 480×480 blocks in Bedrock Edition.

This leaves only a 368×368 block section in Java Edition or 416×416 block section in Bedrock Edition where a structure can generate.

The chance of a fortress generating instead of a bastion is 2⁄5 (40%) in Java Edition and 1⁄3 (33.3%) in Bedrock Edition. However, if a bastion attempts to generate in the basalt deltas biome, a fortress generates instead, making fortresses most common in that biome.

The chance of a fortress attempting to generate instead of a bastion is 2⁄5 (40%) in Java Edition and 1⁄3 (33.3%) in Bedrock Edition.

However, if a bastion attempts to generate in the basalt deltas, a fortress generates instead, resulting in fortresses being the most common in the basalt deltas.

Blaze Spawner Locations

Blaze spawners are the primary reason most players visit fortresses. Each fortress can have up to two blaze monster spawner platforms. These are exterior structures consisting of three full-block "stairs" leading to a small platform fenced with Nether brick fence, with a blaze monster spawner in the center.

Up to 2 blaze monster spawner platforms: structures consisting of three full-block "stairs" leading to a small platform fenced with Nether brick fence, with a blaze monster spawner in the center.

The fortress generation always starts with a plain four-way crossing centered at chunk coordinates 11, ~, 11 of the designated chunk. From there, exterior bridges and interior corridors extend outward. Blaze spawners are found on exterior platforms, so look for open-air bridges rather than enclosed hallways.

Finding Nether Wart

Nether wart is a fungus harvested from Nether wart crops and is used to plant them. It is an essential ingredient in almost every potion.

Nether wart is a fungus harvested from Nether wart crops and is used to plant them.

It is an essential ingredient in almost every potion.

Nether wart crops generate in Nether fortresses in soul sand gardens around stairwells or in chests. It can also appear in bastion remnant courtyards. Because it only generates in these specific structures, it is possible for a fortress or bastion to generate without any Nether wart at all.

Nether wart can generate in Nether fortresses in soul sand gardens around stairwells or in chests.

Because it only spawns in these specific structures, it's possible for a Nether fortress or bastion remnant to generate without Nether wart.

Farming Nether Wart

Once you have collected some Nether wart, you can farm it anywhere. Nether wart can only be planted on soul sand — it cannot be planted on soul soil. It grows through four stages. Each random tick gives a 10% chance of advancing one stage. At default random tick speed, a single Nether wart takes about 34 minutes to fully mature. The growth rate is not affected by light or any other environmental factors, and bone meal cannot be used on Nether wart.

Nether wart can only be planted on soul sand.

The growth rate is not affected by light or any other environmental factors.

Bone meal cannot be used on the Nether wart.

A fully mature crop yields 2–4 Nether wart. Using a tool enchanted with Fortune increases the maximum by 1 per level, up to 7 with Fortune III. Immature crops drop only one Nether wart, even with Fortune.

Breaking a fully grown Nether wart drops 2 to 4 Nether warts, while an immature one drops a single Nether wart.

Using a tool enchanted with Fortune increases the maximum number of Nether wart dropped by 1 per level, for a maximum of 7 for a tool enchanted with Fortune III.

Navigation Tips for Speedrunners

For speedrunners, finding a fortress quickly is essential. Use the /locate command if cheats are enabled. Otherwise, travel along the X or Z axis — fortresses generate in a grid pattern, so moving in a straight line increases your chances of crossing into a region that contains one. The basalt deltas biome is a good place to search because fortresses are most common there. Once inside, prioritize finding a blaze spawner platform and a soul sand garden for Nether wart. Remember that beds explode in the Nether, so bring a shield or use other methods to deal with blazes. For more on bed safety, see our guide on Minecraft Bed Mechanics: Overworld vs. Other Dimensions.