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This feature is exclusive to Java Edition, Bedrock Edition and PlayStation 4 Edition.

A composter is a farmer's job site block that converts crops and plants into bone meal.


Block Composter
Hardness 0.75
Tool Axe
Breaking time[note 1]
Hand 1.3
Wood 0.85
Stone 0.6
Iron 0.45
Diamond 0.3
Gold 0.2
  1. Times are for unenchanted tools in seconds.


Name Ingredients Crafting recipe Description
Composter Any wood Fence +
Any Planks

[Java Edition only]
Composter Any wood Slab

[Bedrock and PlayStation 4 editions only]

Natural generation[edit]

Composters can generate in farms in villages.


Composters can be used to produce bone meal. To do so, the player must use any of a selection of items on the composter. The composter can also be used to recycle unneeded plant items. When an adjacent comparator is facing away from the composter, a comparator signal strength of up to 8 is emitted depending on the fullness of the block.


The composter can be filled with compost, which is done by adding compostable items to it. When successfully adding an item, a green particle appears. See the table below for all supported items. These items have different levels of compostability. The higher the percentage of an item, the more likely it is for that item to add another layer of compost to the block when used on it. Each layer of compost has a podzol-like appearance. When the composter reaches the 7th layer of compost, the compost changes appearance indicating that bone meal can be collected by using the composter a final time.

The following table shows the items that can be used in a composter, the percent chance for an item to add a level of compost, and the average number of items needed to fill a composter:

30% 50% 65% 85% 100%
Average number of items required to fill a composter
≈23.33 14 ≈10.77 ≈8.24 7


Composters can interact with hoppers. A composter directly below a hopper will pull bone meal from it. A hopper directly above a composter will push items into it. See Hopper § Redstone component for more details.

Hoppers cannot interact with the sides of a composter.

Changing villager profession[edit]

If a village has a composter but no farmer villager, any resident villager who has not already chosen a job site block has a chance to change their profession to farmer.

Redstone component[edit]

A composter can act as a power source for a redstone comparator. With a composter behind it (either directly, or separated by an unpowered solid block), a comparator outputs a signal strength proportional to how full the composter is: 0 for empty, 1 for one-seventh full, 2 for two-sevenths full, 3 for three-sevenths full, 4 for four-sevenths full, 5 for five-sevenths full, 6 for six-sevenths full, 7 for completely full but the bone meal is not ready to collect, 8 for completely full and the bone meal is ready to collect. However, if there is a block between the composter and comparator, the comparator does not immediately update.


A composter can be used as fuel in a furnace to smelt 1.5 items.

Data values[edit]

Block states[edit]

Java Edition:

Name Default value Allowed values Description
When at level 8, bone meal is able to be collected from the composter.


Java Edition
1.1419w03aAdded composters.
19w03bAll mushroom blocks can now be used in composters.
19w04aComposters now spawn in village farms.
19w05aChances changed from 10/20/50/80/100% to 30/50/65/85/100%.
Bedrock Edition
1.10.0beta composters, which are available only through Experimental Gameplay with a different crafting recipe.
1.11.0beta composter functionality.
beta now supports hopper placement.
PlayStation 4 Edition
1.91Added composters.


Issues relating to "Composter" are maintained on the bug tracker. Report issues there.