Can You Put Tomatoes in Compost?

Composting is a sustainable and ecologically friendly way to manage kitchen waste, turning organic material into a rich and beneficial additive for your garden. Understanding what can and can’t go into your compost pile is vital to creating a useful, nutritious compost without attracting pests or creating unpleasant odors.

A frequently asked question among those starting to compost is: “Can you put tomatoes in compost?” This article examines this topic in-depth, offering a comprehensive guide to the composting of tomatoes.

1. What is Compost?

Compost is a mixture of organic materials that have been decomposed and recycled as a soil amendment. It is rich in nutrients and beneficial to plants. Composting involves collecting green waste (like vegetable scraps, coffee grounds, and grass clippings) and brown waste (such as leaves, twigs, and paper), and combining them in a specific ratio to create the perfect environment for decomposition.

Composting is an environmentally friendly way to manage household waste, reducing the volume of material going to landfill. It also enriches soil, improving its structure, nutrient content, and moisture-holding capacity, thereby enhancing the health and growth of plants.

2. Can You Put Tomatoes in Compost?

In the context of composting, tomatoes can be somewhat controversial. While some people worry that tomatoes might introduce diseases or pests into their compost pile, the reality is that, yes, you can put tomatoes in compost. There are just a few considerations to bear in mind.

Raw tomatoes, like any other vegetable, are perfectly safe to compost. They’re rich in nitrogen and will decompose quickly, adding nutrients to your compost. However, cooked tomatoes or those covered in oil or sauces should not be composted because these additives can attract pests and disrupt the composting process.

3. Concerns about Tomato Diseases

The main concern with composting tomatoes involves diseased plants. Diseases like blight and other fungal infections can survive the composting process, especially if the compost pile doesn’t reach high enough temperatures.

If you suspect your tomatoes are diseased, it’s recommended to dispose of them in another way or compost them separately. This reduces the risk of the disease spreading to other plants when the compost is used.

4. Composting Tomato Plants

Aside from the fruit itself, tomato plants can also be composted. These plants add a good balance of green material (leaves, stems) and brown material (stems, dried leaves) to the compost pile. However, the same rules apply: if the plant was diseased, it’s better to dispose of it separately.

5. The Composting Process

Composting involves creating a balance of green and brown materials, air, and moisture. Tomatoes, as green material, contribute nitrogen to the compost. The green material needs to be balanced with brown material, which contributes carbon.

The composting pile should be turned regularly to introduce air, which aids in the decomposition process. Maintaining the right level of moisture—like a wrung-out sponge—is also important for compost health.

6. Composting Methods

There are different methods of composting, and the best method for you will depend on your circumstances. Hot composting involves regularly turning the compost to speed up the decomposition process and kill any pathogens. This method is best if you want to compost potentially diseased tomatoes.

Cold composting, on the other hand, involves less maintenance but takes longer. Vermiculture, or worm composting, is another method that’s great for small spaces and produces nutrient-rich compost.

7. Using Tomato-based Compost

Once your compost is ready, it can be used to enrich your garden soil. It’s ideal for use in vegetable gardens, flower beds, and potted plants. The nutrient-rich compost will promote plant health and growth.

It’s important to ensure that the compost is fully decomposed before use. Undecomposed material can compete with plants for nutrients and potentially introduce pests or diseases.

8. Other Items to Compost

In addition to tomatoes, there are many other kitchen scraps that are perfect for composting. This includes fruit and vegetable peels, coffee grounds, tea bags, and eggshells. Yard waste like leaves, grass clippings, and small branches can also be composted.

Remember to avoid composting meat, dairy, diseased plants, and any material that has been treated with pesticides or herbicides.

9. Common Composting Mistakes

Avoiding common composting mistakes will help ensure your compost pile is successful. These include an imbalance of green and brown materials, insufficient aeration, and overwatering. Also, avoid composting any materials that might attract pests or introduce disease.

10. Composting: An Eco-friendly Practice

Embracing composting is a small but significant step towards a more sustainable lifestyle. By turning kitchen and yard waste into a valuable resource, you help reduce landfill waste and enrich your garden without the need for synthetic fertilizers.


To answer the question, “Can you put tomatoes in compost?”, the answer is a resounding yes—with a few caveats. Tomatoes, like other fruits and vegetables, make excellent compost material due to their high nitrogen content. The only precaution to keep in mind is the potential for disease transmission from infected plants, which can be mitigated with careful compost management. All in all, composting is an eco-friendly practice that can turn your waste into a valuable resource for your garden, promoting healthier soil and thriving plants.

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