AUTOMATIC COMPOSTER

Materials List

Overview: what the Automatic Composter is and does

Feeds compostable items into a composter automatically and collects bone meal output. Zero redstone required, uses only hoppers. Perfect companion for crop farms.

As a utility build it automates a processing job — smelting, brewing, composting, or generating a resource — to save repetitive manual work. It is a beginner-friendly build: the wiring is forgiving and a first-time redstoner can finish it in one sitting.

It fits in roughly 1W x 1L x 5H and works in Minecraft 1.14+ through to the current 1.21 release.

How it works: the redstone mechanics

Another redstone-free hopper build: a top hopper feeds compostable items into a composter, and a bottom hopper collects the bone meal the composter produces once it fills. An input chest above and an output chest below make it fully hands-off alongside a crop farm.

The core parts doing the work are composter, hopper, and chest; the remaining materials are structure and wiring that hold those pieces in the right relationship.

Because it automates a processing step, the limiting factor is the machine's own cycle time, and the redstone simply has to feed it in the correct order and rhythm.

How to build it

1. 1Place the composter.
2. 2Place a hopper on top of the composter, pointing into it.
3. 3Place an input chest on top of the hopper.
4. 4Place a hopper below the composter, pointing into an output chest.
5. 5Fill the input chest with compostable items (seeds, crops, etc.).
6. 6The top hopper feeds items in, the composter processes them, and bone meal drops into the bottom hopper.

Uses & applications

• ▸As a utility build it automates a processing job — smelting, brewing, composting, or generating a resource — to save repetitive manual work.
• ▸Built from 1× composter, 2× hopper, and 2× chest and more, it slots into a survival base as a beginner-level project.
• ▸Connect its input and output chests to a wider item network so it processes resources unattended.
• ▸Scale the array up by repeating the unit once the single version works.

Tips & common mistakes

• !Only compostable items work, so filter the input — feeding it non-compostables just clogs the top hopper.
• !Test the full cycle in a creative-mode copy first, then rebuild it in survival once you know the timing holds.
• !Remember a powered hopper is locked, not active — keep stray redstone away from the hopper lines unless you deliberately want to gate item flow.

Automatic Composter FAQ