
The Underground Glowing Mushroom biome is a vibrant world of blue-glowing grasses, plants, and giant mushrooms. This biome is home to unique enemies and is the only place to find Mushroom Grass Seeds, essential for creating a Surface Glowing Mushroom Biome. To build an Underground Mushroom Biome, one must first locate an existing underground biome, tunnel to the surface, and line the tunnel walls with mud. After waiting for the blue grass to grow, the rest of the biome can be constructed. Alternatively, creating a grid of 1x1 empty cells with mud blocks allows mushroom grass to spread and accelerate the biome-building process.
| Characteristics | Values |
|---|---|
| What you need | Mud blocks, mushroom grass seeds, and blue grass seeds |
| How to find an underground mushroom biome | Look for rock and dirt rock layers |
| How to build | Place mud blocks in a grid with 1x1 empty cells, then plant seeds in random places and wait for grass to spread |
| Size | At least 50-100 blocks |
| How to know when it's done | The background will get darker, and the music will change |
| Post-construction | Build a house for Truffles, preferably a mushroom house |
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What You'll Learn

Prepare by finding an underground glowing mushroom biome
To build an underground mushroom biome, you must first locate an underground glowing mushroom biome. These biomes are characterised by mushroom grass, glowing mushrooms, and giant glowing mushrooms growing on mud blocks. The grasses and plants emit a vibrant blue glow, and the background depicts numerous small mushrooms. Underground glowing mushroom biomes can be found naturally, randomly generating during world creation. They are typically located below 0 depth, around the rock layer and dirt rock layer.
To find an underground glowing mushroom biome, look for areas with a high concentration of mud blocks, as this is where the mushroom grass and glowing mushrooms thrive. You can also identify these biomes by their distinctive blue glow, which is emitted by the grasses and plants. Additionally, the background of an underground glowing mushroom biome will feature small mushrooms.
Another way to locate an underground glowing mushroom biome is by finding underground houses. These structures are commonly found within these biomes due to their size and placement. Exploring these underground houses can also lead you to gold chests, which are known to be located within underground glowing mushroom biomes.
It is important to note that underground glowing mushroom biomes can be dangerous. They are known to spawn unique enemies, including some challenging hard mode monsters. Therefore, it is recommended to come prepared when venturing into these biomes.
Once you have located an underground glowing mushroom biome, you can begin the process of creating your own above-ground mushroom biome. This can be done by obtaining mushroom grass seeds from the underground biome and planting them in mud blocks on the surface, allowing them to spread and create the necessary environment for Truffles to spawn.
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Craft mud blocks with dirt and water
To craft mud blocks with dirt and water, you must first find an underground glowing mushroom biome. These biomes can be found naturally, randomly generating on world creation, and are usually located at around the rock layer and dirt rock layer. Once you've located your desired spot for crafting, follow these steps:
Firstly, gather the necessary materials: dirt blocks and water. You can find dirt blocks readily available in the underground mushroom biome or create your own by using a shovel on the surrounding terrain. For the water, you can use a water bottle or find another source.
Now, stand near the water source with your dirt blocks. You can then craft Mud Blocks out of Dirt Blocks. This process can be automated using a dispenser if you're using a water bottle.
It's important to note that mud blocks are susceptible to conversion into dirt blocks in Hardmode by the evil biomes, Chlorophyte Ore, and thrown water. However, mud blocks with mushroom grass cannot be converted.
Once you have your mud blocks, you can start constructing your mushroom biome. Line one of the sides of your tunnel with the mud blocks and connect it to the existing mushroom biome. This will provide a suitable foundation for the mushroom grass to spread.
To speed up the process of creating your mushroom biome, you can put the mud blocks in a grid of 1x1 empty cells. This way, the mushroom grass will have more blocks to spread to. After placing the mud blocks, you will need to obtain mushroom grass seeds, which can be dropped from glowing mushrooms underground. Place these seeds on your mud blocks, and wait for the grass to grow.
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Place mushroom seeds on mud blocks
To build an underground mushroom biome, you will need to place mushroom seeds on mud blocks. This is an essential step in creating a thriving mushroom ecosystem. Here are the detailed steps to follow:
Prepare the Mud Blocks
Start by crafting mud blocks. To do this, you will need to mix dirt with water. The ratio of dirt to water may vary depending on the specific requirements of the mushroom species you are cultivating. Ensure that you have a sufficient quantity of mud blocks to form the foundation of your underground mushroom biome.
Create a Suitable Environment
Find an underground area that is unimportant, such as a hill or flat region, and begin to lay down your mud blocks in a strip or grid pattern. A grid pattern with alternating mud and air blocks can provide more surface area for the mushrooms to spread. This step is crucial in determining the future growth and expansion of your mushroom biome.
Plant the Mushroom Seeds
Once you have prepared the mud blocks and arranged them in your desired pattern, it's time to plant the mushroom seeds. Place the seeds on the mud blocks, spacing them out evenly. This will encourage the growth of mushroom grass across the mud blocks. The seeds can be obtained from glowing mushrooms found underground.
Allow Time for Growth
After planting the seeds, exercise patience and allow time for the mushrooms to grow. It typically takes a few in-game days for the mushrooms to spread across the mud blocks. During this time, the mushroom grass will begin to convert the mud blocks into blue grass, a key indicator of the developing mushroom biome.
Monitor the Progress
Keep a close eye on the progress of your mushroom biome. As the number of mushroom grass blocks increases, you will observe subtle changes in the environment. The background will gradually darken, and eventually, the music will shift, signaling that your underground mushroom biome is taking shape.
By following these steps and placing mushroom seeds on mud blocks, you will be well on your way to creating a flourishing underground mushroom biome. Remember to be cautious of potential enemies that may spawn in such environments and take the necessary precautions to protect your biome and any nearby settlements.
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Wait for the grass to spread
After you've planted your mushroom grass seeds, you'll need to wait for the grass to spread. This process can be sped up by placing the seeds on opposite sections of your mud strip. You'll need about 100 blocks of blue grass in total for your mushroom biome to be complete. As you start to have enough mushroom grass blocks, the background will start to change and get darker and darker, eventually, the music will change and this is when you know you're done and it's officially a mushroom biome.
It will take about 5-6 in-game days for the grass to spread and cover your mud strip. You can also use the Clentaminator with Dark Blue Solution on the mud to spread the grass. Another way to speed up the process is to make a grid of mud with a pattern of one mud block, one air block, and so on, to give the grass more blocks to spread to. You can also expand your strip with more mud to get the number of mushroom grass blocks you need.
If you're creating a surface mushroom biome, you should be cautious as the enemies that spawn there are much more powerful than other pre-Hardmode enemies. It is recommended to make two NPC houses in pre-Hardmode to prepare for the Truffle and an NPC companion. This will also reduce enemy spawn rates.
A floating island can be a good option for a surface mushroom biome as it keeps the biome and its darkness out of the way of most surface activities and away from the biome spread.
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Build a house for the Truffle NPC to spawn
To build an underground mushroom biome, you must first find an underground glowing mushroom biome. This can be found naturally, randomly generating on world creation. You can also manually create a mushroom biome by placing mud blocks in a grid of 1x1 empty cells, allowing mushroom grass to spread and grow.
To build a house for the Truffle NPC to spawn, you must create a surface glowing mushroom biome, as the Truffle NPC requires a house in this biome to spawn. This can be done by finding an underground glowing mushroom biome, tunnelling to the surface, lining one of the sides of the tunnel with mud, and connecting it to the mushroom biome. Wait for the blue grass to grow to the surface, and construct the rest of the biome. You will need about 100 blocks of blue grass for this.
Alternatively, you can create a strip of mud and place mushroom seeds on it, waiting a few in-game days for the grass to spread. You can obtain seeds by harvesting glowing mushrooms in the underground mushroom biome or by moving the Dryad there and buying them. Once you have enough mushroom grass, build a house for the Truffle NPC, preferably a mushroom house, and wait until morning.
It is important to note that the Truffle NPC will only spawn if there are enough houses for other NPCs that have not yet spawned. Additionally, having too much corruption or crimson beneath the house may invalidate the housing. The Truffle NPC will also not spawn if the house is underground.
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Frequently asked questions
A mushroom biome, also known as the Glowing Mushroom Fields, is a biome characterised by mushroom grass, glowing mushrooms, and giant glowing mushrooms growing on mud blocks.
First, find an underground glowing mushroom biome, usually found at the rock layer and dirt rock layer. Then, create a strip of mud and place your mushroom seeds. Wait a couple of in-game days.
You will need about 100 blocks of blue grass in total. Put the seeds on opposite sections to speed up the spread.
As you start to have enough mushroom grass blocks, the background will get darker and the music will change. This is when you know you're done.
Build a suitable house and wait until morning.

























