How to Make a Slime Farm in Minecraft

Slimeballs look like a joke item until you need them: sticky pistons, slime blocks, leads, magma cream and frog food all depend on a steady supply. Slimes are too rare to hunt one by one, so a purpose-built farm inside a slime chunk is the real answer. Here is how to put one together.

What You Need

• 2 redstone repeaters and 7 redstone dust
• 1 note block and 1 lever
• 1 Allay
• 2 water buckets
• A stack of magma blocks
• A stack of torches or froglights
• About 4 stacks of building blocks, plus pickaxes and hoppers/chests

Step 1: Find and Clear a Slime Chunk

Slimes spawn underground only in specific chunks, called slime chunks, and only below Y=40. Above ground they appear in swamp and mangrove swamp biomes at night. The simplest way to confirm a chunk is to dig below Y=40 and explore until a slime naturally spawns. Once you have your chunk, dig it out from about Y=40 down to Y=10, and seal any cave openings so other hostile mobs stay out of the farm.

Step 2: Spawn-Proof the Surroundings

Kill off any existing mobs nearby, break any spawners you find, and light up the surrounding caves with torches or lanterns. Every zombie or skeleton spawning in a nearby cave is eating into the mob cap that your slimes need.

Step 3: Build the Spawning Platforms

Make two floating platforms inside the cleared chunk, roughly 14 by 14 blocks each, with at least five blocks of vertical space between them — one at Y=30 and another at Y=25 works well. Leave a three-block gap on every side so wandering slimes hop off the edge. Set froglights or other light blocks into the platform floors: this keeps hostile mobs from spawning on them while slimes, which ignore light down here, keep appearing.

Cover the bottom of the pit with magma blocks. Slimes that fall in take damage until they split down and die, dropping slimeballs. A layer of water over the magma helps move drops toward collection.

Step 4: Set Up Collection

The elegant option is an Allay. Build a small third platform above the kill floor with a note block on its edge and a hopper beneath it feeding a chest. Wire the note block to a redstone clock using the repeaters and dust, give your Allay a slimeball, and it will spend its day ferrying drops to the note block and tossing them into the hopper. If Allays feel fiddly, chained hoppers across the floor or hopper minecarts collect nearly as well.

Tips for Better Rates

• More platforms means more spawning space. Expand upward and outward when you can.
• An iron golem placed on a platform lures slimes toward it, speeding up how fast they hop into the pit.
• Stay within spawning range of the farm while it runs, and keep nearby caves lit. Slimes also spawn more freely around the full moon cycle on the surface, which matters for swamp hunting but not for your chunk farm.

Once it is running, the farm quietly stocks you with slimeballs for every sticky piston contraption and frog-feeding session you could want.