How to Make a Slime Farm in Minecraft: Two Working Designs

A slime farm is a large, flat, dark-or-lit platform where slimes can spawn, plus a way to kill them and collect the drops. Slimes only spawn in two places, so the first job is picking one: a slime chunk below Y 40, which works all day in any light, or a swamp at night. For most players, a slime chunk farm is the one worth building.

Slime chunks vs swamps for a farm

	Slime chunk	Swamp or mangrove swamp
Height	Below Y 40	Y 51 to 69
Light	Any level	7 or lower
Time	Any time	Mostly at night; most on a full moon, none on a new moon
Location	1 in 10 chunks	Anywhere in the biome

For the swamp side, see our swamp biome guide. The rest of this page focuses on slime chunks.

Finding a slime chunk

A chunk is a 16 by 16 column of the world, lined up on coordinates that are multiples of 16.

• Java: slime chunks depend on the world seed. Run /seed (or get the seed from the world settings) and enter it, along with your edition, into a slime chunk finder. Press F3 + G in game to show chunk borders. Our page on world seeds explains what the seed is.
• Bedrock: slime chunks are the same in every world, so the finder just needs your coordinates.

If you can’t use a finder, dig a big room below Y 40 and wait. Slimes appearing in one 16x16 area tell you that you’re in one.

Design 1: a cleared slime chunk

1. Dig out the slime chunk from about Y 39 down. Make spawning floors with a 3-block gap between them; slimes need room to spawn, especially big ones.
2. Light everything around the chunk and fill nearby caves, so other hostile mobs spawn somewhere else. Remember: light doesn’t stop slimes in a slime chunk, so you can light the floors themselves too.
3. Stand somewhere between 24 and 128 blocks away. Mobs don’t spawn within 24 blocks of you, and they despawn beyond 128.
4. Kill and collect. The simplest version is you with a sword, sweeping slimes as they come. Small slimes split from bigger ones, and only the smallest drop slimeballs.

Design 2: automatic collection

Slimes attack iron golems, and they’ll hop toward one wherever it is. Put an iron golem in a protected spot at the edge of the floors, with a gap or pit between the platform and the golem. Slimes jump toward it, fall in, and land on magma blocks over hoppers, which damage the small ones until they die. Hoppers carry the slimeballs to a chest.

The exact layout varies, so copy a tested design for your edition, especially on Bedrock, where mob behavior differs a little.

What you’ll get

Each small slime drops 0 to 2 slimeballs, more with Looting. A cleared slime chunk gives a steady supply, which you’ll need: a single slime block takes 9 slimeballs, and every sticky piston takes one. Read the slime mob guide for sizes, health and combat details.