Brown and Green Items That Work in the Composter
A Minecraft composter accepts two broad categories of material: brown items (like wood, hay, and paper products) and green items (like seeds, crops, and leaves). Each item fills the composter to a different level—some items are worth 10% of a full bin, others 30% or more. The composter fills in layers, and when it reaches the top, it produces one bone meal.
Brown items include wood-related scraps: wood blocks, wood slabs, wood stairs, wood fences, sticks, sawdust, and bark blocks. Paper, cardboard, and hay bales also compost. Mushroom blocks (both red and brown) count as brown material. Bamboo and bamboo planks work too. None of these are particularly efficient—most fill only 5% to 10% of the composter per item.
Green items are where you get better returns. Seeds of any kind (wheat, beetroot, pumpkin, melon) each fill 30% of the composter. Crops themselves—wheat, carrots, potatoes, beetroot—fill 50% to 65%. Leaves (oak, birch, spruce, jungle, acacia, dark oak, mangrove, cherry, and azalea leaves) fill 30% each. Seagrass, sea pickles, and kelp fill 10% to 30%. Flowers, tall grass, and grass blocks all work and fill 10% to 30%.
Key Takeaways
- Crops like wheat, carrots, and potatoes fill the composter 50% to 65% per item and are the most efficient materials to use.
- Seeds of any kind fill 30% of the composter, making them a solid mid-tier option when you have excess seeds from farming.
- Leaves from any tree type fill 30% each and are straightforward to gather in bulk from tree farming or natural forests.
- Wood blocks, sticks, and paper fill only 5% to 10% each, so they are worth composting only when you have large quantities.
- The composter produces one bone meal when it fills completely, regardless of which items you used.
The Full List of Compostable Items and Their Fill Rates
Here is the complete breakdown of what goes into a composter and how much space each item takes:
| Item | Fill Rate | Category |
|---|---|---|
| Wheat, Carrots, Potatoes, Beetroot | 65% | Green |
| Pumpkin, Melon | 65% | Green |
| Wheat Seeds, Beetroot Seeds, Pumpkin Seeds, Melon Seeds | 30% | Green |
| Leaves (all types) | 30% | Green |
| Seagrass | 30% | Green |
| Sea Pickles | 10% | Green |
| Kelp | 10% | Green |
| Flowers (all types) | 10% | Green |
| Tall Grass, Grass Block | 10% | Green |
| Hay Bale | 10% | Brown |
| Wood Blocks (all types) | 5% | Brown |
| Wood Slabs, Stairs, Fences (all types) | 5% | Brown |
| Sticks | 5% | Brown |
| Sawdust | 5% | Brown |
| Bark Blocks | 5% | Brown |
| Bamboo, Bamboo Planks | 5% | Brown |
| Paper | 10% | Brown |
| Cardboard | 10% | Brown |
| Mushroom Blocks (Red and Brown) | 10% | Brown |
The percentages shown are the amount of the composter's capacity that each item fills when you place it inside. You can mix brown and green items freely—the composter does not care about the order or ratio.
Why Crop Farming Is the Best Source of Compost Material
If you want to produce bone meal steadily, crop farming is your most efficient path. A wheat farm produces seeds as a byproduct when you harvest, and the wheat itself fills the composter at 65%—the highest rate in the game. Carrots and potatoes are equally efficient and grow faster than wheat once you have the first seed.
The advantage of crop farming is scale. A moderately sized automated farm can produce hundreds of crops per hour, which means you can fill a composter multiple times without leaving your farm. Bone meal then goes back into the farm to speed up growth, creating a closed loop. This is far more practical than gathering leaves or flowers, which requires traveling and collecting.
If you do not yet have a farm running, leaves are your next-best option. Any tree farm produces leaves as a byproduct of wood harvesting, and leaves fill at 30%—the second-best rate for easily renewable materials. Flowers can work in a pinch if you have a flower farm, but they fill at only 10%, so you would need ten times as many flowers as crops to fill one composter.
What Does Not Compost
Many items that seem like they should compost do not. Dirt, grass, and stone blocks cannot be composted. Logs and stripped logs do not work (only the planks made from them do). Cactus, sugar cane, and vines cannot be composted. Nether-related plants like crimson and warped stems, shroomlight, and nether wart do not work either.
Food items like bread, apples, and meat cannot be composted. Dyes, dye-producing items like cocoa beans, and ink sacs do not work. Bonemeal itself cannot be put back into the composter. If you try to place an item that does not compost, the composter straightforward rejects it and the item stays in your inventory.
How to Set Up a Composter for Automatic Bone Meal Production
A composter works best when connected to a hopper. Place a hopper above the composter and feed items into it from a storage system or farm. When the hopper drops items into the composter, they fill it automatically. Once the composter reaches full capacity, it produces bone meal, which falls into a hopper below and flows into your storage.
You can automate this further by running a farm output directly into the hopper above the composter. A wheat farm with an automatic harvester (using pistons or water) can feed crops into the hopper continuously. The composter fills, produces bone meal, and the bone meal travels down into storage—all without you lifting a finger.
For smaller operations, you can straightforward throw items into the composter by hand. Place the composter in a convenient location near your farm or storage, and whenever you have excess crops or leaves, toss them in. When it fills, collect the bone meal and use it to speed up your next planting cycle.
Using Bone Meal From Your Composter
Bone meal serves two main purposes: speeding up crop growth and coloring sheep and dogs. When you use bone meal on a crop, it advances the growth stage by one or more levels when ready. A wheat plant at stage 0 can jump to stage 3 or 4 with a single bone meal, cutting your harvest time dramatically.
In a farm loop, you harvest crops, compost them, get bone meal back, and use that bone meal on the next batch of crops. This is not infinite—you lose some efficiency because not every crop becomes bone meal—but it significantly speeds up farming compared to waiting for natural growth. The more crops you compost, the more bone meal you produce, and the faster your farm grows.
Frequently Asked Questions
Can I compost logs or wood blocks?
Wood blocks compost at 5%, but logs do not. You must craft logs into planks first, then the planks compost at 5%. Stripped logs also do not work. If you have a lot of wood, it is usually better to use it for building or fuel than to compost it.
What is the fastest way to fill a composter?
Crops like wheat, carrots, and potatoes fill the composter at 65% per item, so you need only two crops to fill it completely (with a small amount of overflow). If you have a farm, this is by far the fastest method. Seeds fill at 30%, so you would need four seeds. Leaves fill at 30%, so you would need four leaves.
Do I need to mix brown and green items?
No. The composter does not require a specific ratio of brown to green items. You can compost only crops, only leaves, or any mix. The fill rate is the same regardless of the combination.
Can I get bone meal any other way?
Yes. Bone meal drops from skeletons and wither skeletons when they die. You can also find it in loot chests in various structures. However, composting is the most renewable source once you have a farm set up.
What happens if I put a non-compostable item in the composter?
The composter rejects it. The item stays in your inventory and the composter level does not change. You can safely throw anything at a composter without breaking it or wasting materials.