Certain items should never make their way into your compost pile to ensure healthy, effective decomposition and avoid attracting pests or creating harmful byproducts. The three main categories of items to avoid are diseased plants, meat and dairy products, and pet waste. These can harbor pathogens, create foul odors, and attract unwanted wildlife, hindering the composting process.

What NOT to Compost: The Top 3 Items to Avoid

Composting is a fantastic way to reduce waste and create nutrient-rich soil for your garden. However, not everything belongs in your compost bin. Understanding what to exclude is just as crucial as knowing what to include. By avoiding specific items, you can prevent potential problems and ensure you get the best compost possible.

1. Diseased Plants and Weeds with Seeds

While it might seem like a good idea to compost all your garden waste, diseased plants pose a significant risk. If the compost pile doesn’t reach a high enough temperature, the pathogens that cause plant diseases can survive. These pathogens can then be spread back into your garden when you use the finished compost, infecting healthy plants.

• Why avoid them? Pathogens can persist through the composting process.
• What to do instead? Dispose of diseased plants in your regular trash or municipal yard waste program if it specifically handles such materials.
• Consideration for weeds: Similarly, weeds that have gone to seed should be avoided. The composting process may not kill all weed seeds, leading to a compost pile that actively spreads weeds throughout your garden.

2. Meat, Dairy Products, and Oily Foods

Meat scraps, bones, cheese, milk, and greasy leftovers are a big no-no for home compost piles. These items decompose slowly and can create foul odors, attracting pests like rodents, flies, and raccoons. Furthermore, they can harbor harmful bacteria like Salmonella and E. coli, making the finished compost unsafe for use around edible plants.

• Attracts Pests: Unpleasant smells draw unwanted visitors to your compost bin.
• Health Risks: Bacteria from these items can contaminate your compost.
• Slow Decomposition: Fats and proteins break down much slower than plant matter.

Commercial composting facilities often have the high temperatures needed to break down these materials safely, but home composters typically lack this capability. Stick to fruit and vegetable scraps, coffee grounds, tea bags, and yard waste for a cleaner, safer compost.

3. Pet Waste (Dog and Cat Feces)

While animal manure from herbivores like cows and horses is excellent for compost, dog and cat feces are different. These waste products can contain parasites, bacteria, and viruses that are harmful to humans. Composting these materials at home is generally not recommended unless you have a specialized composting system designed to kill these pathogens effectively.

• Pathogen Concerns: Feces can carry dangerous microorganisms.
• Parasite Risk: Parasites from pet waste can survive in typical home compost conditions.
• Odor and Pests: Like meat and dairy, pet waste can also create strong odors and attract pests.

If you want to compost pet waste, research specific methods like hot composting or vermicomposting with specific types of worms, but for most home gardeners, it’s best to bag and dispose of it in the trash.

What About Other Items?

Beyond the top three, several other items should be kept out of your compost bin to ensure optimal results and avoid common composting pitfalls. Understanding these nuances will help you create a truly beneficial soil amendment.

Can I Compost Cooked Food?

Generally, cooked food scraps are acceptable if they are not oily or greasy. Plain cooked vegetables, rice, and pasta are fine. However, avoid anything that has been fried or coated in oil, as this falls into the "oily foods" category mentioned earlier.

Are Paper Towels and Napkins Compostable?

Yes, unbleached paper towels and plain paper napkins can be composted. They add valuable carbon to your compost pile. However, avoid those used with harsh chemicals, cleaning agents, or those that are heavily soiled with grease or meat juices.

What About Citrus Peels?

While citrus peels (oranges, lemons, grapefruits) can be composted, it’s best to use them in moderation. Their acidity can slow down the decomposition process and potentially harm beneficial microorganisms in the compost pile. Chop them into smaller pieces to help them break down faster.

People Also Ask

### Can I compost meat bones?

No, meat bones should not be placed in a typical home compost pile. They decompose very slowly and can attract pests like rodents. Furthermore, they can harbor bacteria and create unpleasant odors. Commercial composting facilities with high temperatures can handle them, but home composters should avoid them.

### Is it safe to compost diseased tomato plants?

It is generally not safe to compost diseased tomato plants in a home compost system. Many common tomato diseases, like blight, can survive in compost piles that do not reach sufficiently high temperatures. This can lead to the disease spreading back into your garden when you use the compost.

### What happens if I put meat in my compost?

If you put meat in your compost, it will likely attract pests such as rodents, raccoons, and flies due to its strong odor. The decomposition process will be slower, and harmful bacteria like E. coli and Salmonella may survive, making the finished compost unsafe for use on edible plants.

Next Steps for Better Composting

By carefully selecting what goes into your compost pile, you can create a rich, healthy soil amendment for your garden. Remember to focus on greens (nitrogen-rich materials like vegetable scraps) and browns (carbon-rich materials like dry leaves and shredded paper) in a balanced ratio.

For more information on effective composting techniques, consider exploring resources on hot composting methods or vermicomposting with worms, which can handle a wider range of materials under controlled conditions.