How to Compost Cat Litter

How to Compost Cat Litter?

How to Compost Cat Litter

Composting cat litter is an eco-friendly and cost-effective method for managing your cat’s waste. It helps reduce landfill waste while producing nutrient-rich compost that can benefit your garden. In this article, we will explore the types of cat litter suitable for composting, the benefits, how to set up a compost system, and important safety considerations. By the end, you’ll be well-equipped to start composting your cat’s litter at home.

Types of Cat Litter

1. Biodegradable Cat Litter

Biodegradable cat litters, such as those made from wood, paper, or corn, are the best option for composting. These materials break down quickly and do not cause harm to the environment.

2. Non-biodegradable Cat Litter

Traditional clay-based litters and those containing silica gel are not suitable for composting. These materials do not decompose and can be harmful to the environment when disposed of improperly.

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Benefits of Composting Cat Litter

Composting cat litter has several advantages, including reducing waste, conserving landfill space, and creating nutrient-rich compost for your plants. Additionally, it can help you save money on buying commercial compost or fertilizers.

Preparing to Compost Cat Litter

1. Choosing the Right Litter

Select a biodegradable cat litter for composting, as mentioned earlier. Ensure that it does not contain added chemicals or fragrances, which could negatively impact the composting process.

2. Setting Up a Compost System

You’ll need a dedicated outdoor compost bin or pile for composting cat litter. Avoid using this compost for edible plants due to the potential presence of pathogens. Make sure the composting area is well-ventilated and away from water sources to prevent contamination.

Steps to Compost Cat Litter

Step 1: Separating Waste

Remove solid waste daily and dispose of it in the trash. Do not add it to your compost, as it may contain harmful pathogens.

Step 2: Adding Litter to Compost

Add the used cat litter to the compost bin or pile. Remember to use only biodegradable litter, as non-biodegradable types will not break down and can harm the environment.

Step 3: Mixing and Turn the Compost

Combine the cat litter with other compostable materials like leaves, grass clippings, and kitchen scraps to maintain a balanced carbon-to-nitrogen ratio. Regularly turn the compost pile to ensure adequate aeration and facilitate decomposition.

Step 4: Monitoring the Compost

Check the compost’s temperature and moisture levels periodically. A well-maintained compost pile should reach temperatures between 130 and 160°F (54 and 71°C), which will help kill any potential pathogens. Make sure the compost stays moist but not overly saturated.

Step 5: Harvesting and Using the Compost

After several months, your compost should be fully decomposed and ready to use. Once it resembles dark, crumbly soil, you can use it to fertilize non-edible plants and landscaping.

Safety Considerations

1. Pathogens

Composting cat litter may pose a risk due to pathogens, like the parasite Toxoplasma gondii. It is essential to maintain high temperatures in the compost to kill these pathogens. Avoid using composted cat litter on edible plants.

2. Odor Control

Proper aeration and turning of the compost pile will help minimize unpleasant odors. If you experience strong odors, try adding more carbon-rich materials like leaves or wood chips to balance the pile.

3. Pesticides and Chemicals

Avoid using cat litter containing added chemicals, fragrances, or pesticides, as they can negatively impact the composting process and the final compost quality.

Troubleshooting Common Issues

1. Insufficient Heat

If your compost pile isn’t reaching the required temperatures, try turning it more frequently, adding more nitrogen-rich materials, or insulating the pile with straw or leaves.

2. Slow Decomposition

Slow decomposition can result from poor aeration, an imbalance of carbon and nitrogen materials, or insufficient moisture. Ensure you are turning the pile regularly and maintaining the proper balance of materials.

3. Strong Odors

If your compost pile emits strong odors, it may be too wet, have insufficient aeration, or lack enough carbon-rich materials. Adjust these factors as needed to reduce unpleasant smells.

Alternatives to Composting

1. Vermicomposting

Vermicomposting, or worm composting, uses worms to break down organic matter. However, due to the potential presence of pathogens in cat litter, it may not be the best option for this purpose.

2. Bokashi Fermentation

Bokashi fermentation is an anaerobic process that uses microorganisms to break down organic materials. It can be an alternative method for composting cat litter but research the process and its safety before proceeding.

Can Cat Litter Go In The Green Bin?

Whether cat litter can go in the green bin depends on your local waste management regulations and the type of cat litter you are using. Green bins are typically designated for organic waste, such as food scraps, yard waste, and biodegradable materials.

If you are using biodegradable cat litter, such as wood, paper, or corn-based products, it may be allowed in the green bin. However, you should check with your local waste management authority to confirm their specific guidelines, as some areas may not permit animal waste, including cat litter, in the green bin due to potential health risks and composting requirements.

Non-biodegradable cat litter, such as clay-based or silica gel litters, should not be placed in the green bin, as they do not decompose and can contaminate the organic waste stream. These types of cat litter should be disposed of in your regular trash bin.

Always consult your local waste management guidelines to ensure you are disposing of cat litter correctly and responsibly.

Related: Can You Use Dirt As Cat Litter?

FAQs About How to Compost Cat Litter

Can I compost all types of cat litter?

No, only biodegradable cat litters like wood, paper, or corn-based varieties are suitable for composting.

Is it safe to use composted cat litter in my vegetable garden?

Due to the potential presence of pathogens, it is not recommended to use composted cat litter on edible plants.

How long does it take to compost cat litter?

The composting process typically takes several months, depending on factors like temperature, aeration, and the balance of materials in the compost pile.

What should I do if my compost pile has a strong odor?

If your compost pile has a strong odor, try increasing aeration by turning the pile more frequently, adding more carbon-rich materials like leaves or wood chips, and ensuring it is not overly saturated.

Can I use clay-based cat litter for composting?

No, clay-based cat litter and those containing silica gel are not suitable for composting, as they do not decompose and can be harmful to the environment. Stick to biodegradable options for composting purposes.


Composting cat litter can be an eco-friendly and cost-effective way to manage your cat’s waste while benefiting your garden. Remember to use the biodegradable litter, set up a dedicated compost system, and follow the necessary steps and safety considerations to ensure successful composting.

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