Composting is a fantastic way to reduce waste and create nutrient-rich fertilizer for your garden. But what can you actually put in your compost bin? The rules might seem simple, but there are some surprising do's and don'ts. Let's dive into the world of composting to find out what's allowed in your compost bin.
Understanding the Green and Brown Ratio
Before we start, it's essential to understand the concept of 'greens' and 'browns' in composting. Greens refer to nitrogen-rich materials like fruit and vegetable scraps, while browns are carbon-rich materials such as dry leaves and cardboard. The ideal ratio is 3 parts browns to 1 part greens. This balance helps maintain the right temperature and moisture level for efficient composting.
What's Allowed in Your Compost Bin: Greens
- Fruit and Vegetable Scraps: Apple cores, banana peels, carrot tops, and other fruit and vegetable scraps are excellent for your compost bin.
- Coffee Grounds and Tea Bags: These are rich in nitrogen and can be added to your compost. Just ensure tea bags are removed before they decompose.
- Eggshells: Eggshells are a great source of calcium and can be crushed and added to your compost. They also help deter pests like slugs and snails.
- Herbivore Manure: Manure from herbivores like cows, horses, and rabbits can be added to your compost. However, it's best to avoid meat-eating animals' manure due to potential pathogens.
What's Allowed in Your Compost Bin: Browns
- Leaves: Fallen leaves are an excellent source of carbon and can be added to your compost bin. They also help absorb excess moisture.
- Cardboard and Paper: Shredded cardboard and paper (like newspaper) can be added to your compost. Avoid glossy paper and colored ink as they can be harmful to your compost.
- Sawdust and Wood Chips: These can be added in small amounts, but avoid treated wood as it may contain harmful chemicals.
What to Avoid in Your Compost Bin
While there are many things you can add to your compost bin, there are also items you should avoid. These include meat, dairy, diseased plants, weeds with seeds, and pet waste. It's also best to avoid adding invasive plants to your compost to prevent their spread.

Monitoring Your Compost Bin
Regularly turning and monitoring your compost pile is crucial. The compost should heat up and shrink as it decomposes. If it's not heating up, you might need to adjust the greens to browns ratio or add more water. If it's too wet, you can add more browns to absorb excess moisture.
When to Use Your Compost
Your compost is ready to use when it looks like dark, crumbly soil with no recognizable pieces of the original materials. It should also have an earthy smell. You can use it as a soil amendment, mulch, or potting soil for your plants.
























