What a Compost Does and Why You Need One

A compost in Minecraft turns plant waste into bone meal, which you can use to speed up crop growth or breed animals. You fill it with seeds, leaves, grass, and other organic scraps, and when it reaches full capacity, it produces one bone meal that you can collect. This is the fastest way to get bone meal without killing skeletons or finding it in loot chests.

The compost is a block you craft and place on the ground like any other. Once it is built, you straightforward walk up to it and drop items into it until it fills. Each item you add moves a progress bar forward by a small amount — some items move it more than others. When the bar reaches the top, the compost produces bone meal and resets.

Key Takeaways

  • A compost is crafted from seven wooden slabs arranged in a U-shape around a crafting table, leaving the top open.
  • You fill it by holding an organic item and right-clicking (or using your interact button) on the compost block itself.
  • Seeds, saplings, and leaves fill it fastest; grass and flowers fill it slower; some items like rotten flesh do not work at all.
  • When the compost reaches 100 percent full, it produces one bone meal that pops out as a collectible item.
  • You can place multiple composters next to each other to produce bone meal faster if you have a large farm.

How to Craft a Compost

To build a compost, you need seven wooden slabs of any type — oak, birch, spruce, jungle, acacia, dark oak, or mangrove all work the same way. You can mix types if you want. Chop down a tree, turn the logs into planks at a crafting table, then turn the planks into slabs (three planks in a row makes three slabs).

Open your crafting table and arrange the seven slabs in a U-shape: place one slab in the center of the bottom row, one slab on each side of it, then one slab on each end of the middle row, and one slab on each end of the top row. This leaves the top open so you can add items to it. Collect the compost and place it anywhere on the ground.

Which Items Fill the Compost Fastest

Not all plant items fill the compost at the same speed. Seeds, saplings, and leaves are the fastest — each one fills about 30 percent of the progress bar. If you have a farm with lots of leaf blocks or a tree farm, you can fill a compost in just a few clicks.

Grass, flowers, and wheat fill it more slowly — each one adds about 10 to 15 percent. Sticks, hay bales, and sugar cane are even slower. Items like rotten flesh, bones, and meat do not work at all, so do not waste time trying to compost them. The compost only accepts plant-based scraps.

How to Use a Compost Once It Is Built

Walk up to the compost block and hold an item it accepts in your hand. Right-click on the compost (or press your interact button if you have remapped it). The item disappears and the progress bar inside the compost moves forward. Keep adding items until the bar reaches the top.

When the compost fills completely, it produces one bone meal that pops out as a floating item. Pick it up and use it to grow crops, speed up tree growth, or color wool and other blocks. The compost then resets to empty and you can start filling it again.

Where to Place a Compost for Maximum Efficiency

Place your compost near your farm so you can quickly feed it the waste your crops produce. If you harvest wheat, you get seeds as drops — throw those seeds straight into the compost. If you chop trees, the leaves break and drop as items you can compost.

If you want to produce bone meal very fast, build multiple composters in a row and fill them all at once. A line of five composters can turn a full inventory of seeds into five bone meal in under a minute. This is much faster than waiting for one compost to fill repeatedly.

Bone Meal Uses After You Collect It

Bone meal has three main uses. First, you can right-click it on a crop to when ready grow it one stage — wheat, carrots, potatoes, and beetroot all respond to it. Second, you can use it on saplings to force a tree to grow when ready, which is useful if you are building a tree farm. Third, you can use it on grass blocks to spread grass and flowers across dirt, which is helpful for decorating or creating pasture for animals.

You can also use bone meal on other plants like sugar cane, kelp, and vines to grow them taller. Some players use composters and bone meal together to automate crop farms — the farm produces seeds, the compost turns seeds into bone meal, and the bone meal grows the next batch of crops.

Frequently Asked Questions

Can I use a compost in the Nether or End?

Yes. A compost works the same way in any dimension. It does not need sunlight or water, so you can build one underground, in the Nether, or anywhere else you want to produce bone meal.

What happens if I fill a compost with the wrong item?

Nothing happens. If you try to add an item the compost does not accept, the item stays in your hand and the progress bar does not move. You can then try a different item. There is no penalty for trying.

Do I need to do anything to collect the bone meal?

No. When the compost reaches 100 percent, the bone meal pops out automatically as a floating item. Walk over it or click it to pick it up, just like any other drop.

Can I automate a compost with hoppers?

Yes. You can place a hopper above a compost and feed items into it automatically. The hopper will drop items into the compost, filling it without you having to click. When the bone meal produces, it falls into a hopper below and you can collect it from a chest.

How much faster is a compost than finding bone meal other ways?

A compost is faster than killing skeletons if you have seeds or leaves nearby. One full compost takes about 30 seconds to fill if you use fast items like seeds. A skeleton farm takes longer to set up and produces bone meal more slowly unless it is very large.