Items That Work in the Composter

A composter in Minecraft accepts plant-based materials and turns them into bone meal. Not every plant item works — the composter only takes things that grow from the ground or come directly from crops and trees. Seeds, leaves, flowers, and food crops all work. Rotten flesh, meat, and crafted items do not.

Each item you add fills the composter by a certain amount. Some items fill it a lot (like melon slices or pumpkins), while others barely move the needle (like seeds or grass). When the composter reaches full capacity, it produces one bone meal and empties itself, ready to start again.

Key Takeaways

  • Seeds, crops, flowers, and leaves all compost, but meat, rotten flesh, and crafted food items do not.
  • Different items fill the composter by different amounts — melon slices and pumpkins fill it fastest, while seeds fill it slowest.
  • The composter produces one bone meal when it reaches full capacity, then empties and starts over.
  • Composting is the main way to get bone meal without killing skeletons or finding it in the Nether.

High-Fill Items That Speed Up Composting

Melon slices and pumpkins are the fastest items to compost. Each melon slice fills the composter by 10 percent, so you need only 10 slices to get one bone meal. Pumpkins work the same way. If you have a melon or pumpkin farm, composting is much faster than collecting seeds.

Hay bales also fill the composter by 10 percent each. Carrots and potatoes (the food items, not the seeds) fill it by 5 percent. Bread fills it by 5 percent as well. If you have a food farm and want to turn surplus into bone meal, these are your best bets.

Beetroots and beetroot seeds both work, though beetroot seeds only fill by 1 percent. Nether wart fills by 1 percent too. Cocoa beans fill by 1 percent. These are worth composting only if you have huge amounts and nothing else to do with them.

Low-Fill Items That Add Up Slowly

Seeds of any kind (wheat, melon, pumpkin, beetroot) fill the composter by only 1 percent each. If seeds are your only source, you need 100 seeds to produce one bone meal. This is slow, but seeds are straightforward to collect in bulk from grass and crops, so many players compost them anyway.

Leaves also fill by 1 percent each. If you're clearing trees or a forest, you can throw the leaves into a composter instead of letting them rot. Flowers (roses, tulips, daisies, and all other decorative flowers) fill by 1 percent. Grass and seagrass fill by 1 percent as well.

Dried kelp fills by 1 percent. Vines fill by 1 percent. Glow berries fill by 1 percent. None of these are efficient on their own, but if you're already farming them for other reasons, composting the extras makes sense.

Items That Do Not Compost

Meat and fish do not compost, even though they come from animals. Rotten flesh does not compost. Cooked meat and cooked fish do not compost either. If you want bone meal from food, stick to crops and vegetables.

Crafted items do not compost, even if they're made from compostable materials. Cookies do not work. Cake does not work. Pumpkin pie does not work. Only raw crops and plant materials work.

Mushrooms (red and brown) do not compost. Warped and crimson fungi do not compost. Cactus does not compost. Sugar cane does not compost. Bamboo does not compost. Sticks do not compost. Wool does not compost. Paper does not compost. These are all plant-like, but the composter rejects them.

Setting Up a Composter Farm for Bone Meal

The fastest way to get bone meal is to build a farm that grows melons or pumpkins, then feed the harvest into composters. A single melon or pumpkin plant produces many fruits, and each fruit gives you 10 percent toward bone meal. With 10 composters running in parallel, you can produce bone meal constantly.

Alternatively, build a crop farm (wheat, carrots, potatoes, or beetroot) and compost the food items instead of eating them. This works well if you're already farming for food and have surplus. Carrots and potatoes fill by 5 percent each, so you need 20 per bone meal — still much faster than seeds.

You can also set up a leaf composter by clearing trees and funneling leaves into composters. This is slow (1 percent per leaf) but requires no farming setup. If you're already clearing a forest for wood, composting the leaves is free bone meal.

Why Composting Matters in Survival Mode

Bone meal is useful for growing crops faster, bonemeal-painting grass onto dirt, and speeding up tree and plant growth. In early survival, you might not have access to skeletons or the Nether, so a composter is often your first source of bone meal. Once you have a farm running, composting becomes a way to recycle crop waste into something useful.

Composters also work with hoppers and other redstone contraptions, so you can automate the process. A hopper above a composter can feed items in automatically, and a hopper below can collect bone meal as it's produced. This lets you turn a crop farm into a bone meal factory with minimal effort.

Frequently Asked Questions

Can I compost apples or other food I find in the world?

No. Apples, golden apples, and other found food items do not compost. Only crops you harvest from plants work — wheat, carrots, potatoes, beetroot, melons, pumpkins, and similar items. Anything you craft or find as loot does not compost.

Do sweet berries and glow berries compost?

Glow berries compost at 1 percent per berry. Sweet berries do not compost. This is one of the few cases where similar items behave differently, so check before you assume.

What's the fastest way to get bone meal early in the game?

Plant melons or pumpkins and compost the harvest. Both fill the composter by 10 percent per item, so you need only 10 fruits per bone meal. If you don't have a farm yet, collect seeds from grass and compost them, though this is much slower (100 seeds per bone meal).

Can I automate composting with redstone?

Yes. Place a hopper above a composter to feed items in automatically, and a hopper below to collect bone meal. The composter will process items and output bone meal as it fills, which the lower hopper can catch. This works well with crop farms that produce more than you need.