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You plant mushroom grass seeds in Terraria by first crafting a Mushroom Grass Seed, then placing it on a patch of plain Mud Block.
These seeds don’t behave like normal grass seeds, so you need to know exactly where they’ll take root.
Mushroom grass seeds will only grow when you place them on Mud Blocks, not on dirt, sand, or any other surface.
Once you plant mushroom grass seeds, the mud converts into glowing mushroom grass, which then spreads to nearby mud blocks over time.
In this post, we’ll walk you through the entire process of how do you plant mushroom grass seeds in Terraria, including crafting recipes, placement tips, and how to make your mushroom farm thrive.
Let’s dig in.
Why You Need to Plant Mushroom Grass Seeds This Way
Mushroom grass seeds are a special type of seed because they’re tied to a specific biome: the Glowing Mushroom biome.
When you plant mushroom grass seeds on mud, they transform that mud into mushroom grass, which is the foundation of this underground-friendly biome.
This grass has a beautiful teal glow, and it’s the only way to grow glowing mushrooms, which are used for crafting Mushroom Spears, Mushroom Armor, and the Shroomite Bars you’ll need for endgame gear.
So planting mushroom grass seeds correctly is not just a cosmetic choice, it’s a core part of progression.
1. You Must Use Mud Blocks, Not Dirt
The biggest mistake players make is trying to plant mushroom grass seeds on regular dirt.
Mushroom grass seeds will not attach to Dirt Blocks, so don’t waste them trying.
Instead, you’ll need to gather Mud Blocks, which you can find in any Jungle biome, or craft them by using a Wand of Sparking on water and dirt, though mining them in the jungle is far easier.
Once you have a section of Mud Blocks laid out flat, you can begin to plant mushroom grass seeds directly onto the top or sides of those blocks.
2. The Seeds Come From the Dryad or the Truffle
You can obtain mushroom grass seeds in two main ways.
First, the Dryad will sell you Mushroom Grass Seeds for 50 copper coins each, but only while she’s in a Glowing Mushroom biome.
Second, the Truffle NPC, who moves in once you have a surface Glowing Mushroom biome, sells Mushroom Grass Seeds for the same price.
If you’re just starting out, the simplest route is to create a small surface mushroom patch using seeds you find in underground glowing mushroom caves.
Those naturally generated caves often have mushroom grass seeds you can harvest with a pickaxe, so collect as many as you can.
3. Light Levels Don’t Matter, but Space Does
Unlike most plants in Terraria, mushroom grass seeds don’t need sunlight or torches to grow.
They actually thrive in darkness, which makes them perfect for underground bases and cavern farms.
What does matter is that the mud blocks aren’t blocked by walls or other solid objects.
If you place a wall directly behind the mud block, the grass won’t spread.
So keep your planting area open on all sides, and you’ll see the mushroom grass creep across adjacent mud blocks in no time.
Step-by-Step Guide: How Do You Plant Mushroom Grass Seeds Successfully?
Let’s break down the exact process so you can plant mushroom grass seeds with confidence.
Whether you’re building a small decorative patch or a massive shroom farm, these steps are the same.
Step 1: Gather Mud Blocks
Equip your pickaxe and head to the Jungle.
Mine at least 50 to 100 Mud Blocks, depending on how large you want your farm.
The bigger the area, the more glowing mushrooms you’ll eventually harvest.
Make sure the mud is contiguous, meaning each block touches at least one other mud block, so the grass can spread.
Step 2: Lay Out a Flat Patch
Place the mud blocks in a long horizontal line, or a large rectangle.
A single flat strip is the easiest for beginners, but you can also create stepped terraces if you want a more natural look.
Just ensure no background walls are behind the mud, as mentioned earlier.
Step 3: Select Your Mushroom Grass Seeds
Open your inventory and select the Mushroom Grass Seeds from your hotbar.
You’ll see a green cursor highlight the mud block you’re aiming at.
If the block is valid, the cursor will turn into a seed icon, and you can click to plant.
If you get a red X, that means the block isn’t valid, usually because it’s not mud or it’s blocked by a wall.
Step 4: Plant One Seed Per Mud Block
When you plant mushroom grass seeds, you’ll see the mud turn into glowing mushroom grass almost instantly.
That grass will then spread to adjacent mud blocks automatically, at a rate of about one block every few seconds.
So you only need to plant the seeds on a few central blocks, and then let the spreading do the rest.
Step 5: Wait for Glowing Mushrooms to Appear
Once the grass is established, glowing mushrooms will pop up on the grass over time.
These mushrooms are the ones you harvest, and they respawn continuously as long as the grass stays intact.
Harvesting them gives you glowing mushrooms, which you can then use to craft more mushroom grass seeds at a crafting station with a bottle or alchemy table.
Common Mistakes to Avoid When You Plant Mushroom Grass Seeds
Even experienced Terraria players trip up on a few details when dealing with mushroom grass seeds.
Let’s cover the most frequent errors so you don’t waste time or resources.
1. Using Dirt or Grass Blocks
As we said, mushroom grass seeds only work on mud.
If you try to plant them on dirt, they’ll instantly fail, and you’ll lose the seed.
Double-check your block type before placing.
2. Placing Walls Behind the Mud
Background walls stop the spread of mushroom grass.
If you’re building an underground farm, leave the background open, or use natural cave walls but break any player-placed walls that might block growth.
3. Not Giving the Grass Room to Spread
If your mud patch is too small, like only 5 or 6 blocks, the grass won’t have space to grow mushrooms efficiently.
Aim for at least a 20-block-long strip for a functional farm.
4. Harvesting Too Early
You’ll see small glowing mushrooms appear fairly quickly, but they take a few minutes to fully mature.
If you harvest them too early, you’ll get fewer mushrooms.
Wait until they reach full size, which is easy to spot because they become bigger and brighter.
So, How Do You Plant Mushroom Grass Seeds in Terraria Like a Pro?
You plant mushroom grass seeds in Terraria by placing them on bare Mud Blocks with no background walls.
That’s the core answer, and once you understand that, everything else falls into place.
You can get the seeds from the Dryad or Truffle, or by harvesting them from naturally occurring glowing mushroom caves.
Just lay down your mud, plant a few seeds, and let the teal grass spread across the entire patch.
Then you’ll have an endless supply of glowing mushrooms for crafting and for decorating your base.
Whether you’re a beginner or a seasoned builder, planting mushroom grass seeds is a satisfying and useful skill that opens up new crafting recipes and gorgeous biomes.
So grab your pickaxe, head to the jungle, and start your mushroom farm today.
Happy farming, Terrarian.