Can You Compost Mushrooms?

Have you ever stared at your mushroom scraps, tangled in a dilemma if they belong in your compost bin? Rest assured, you’re not alone; yes, you can compost mushrooms. My goal is to clear any doubts you may have and dive into my best tips for composting mushrooms. In this post, we’ll cover:

  • Why you can and should compost mushrooms.
  • The benefits of composting mushrooms.
  • How to compost mushrooms properly.
  • Some potential challenges and tips for composting mushrooms so that your soil thrives!

Can You Really Compost Mushrooms?

This has been a question on the lips of many compost enthusiasts and home gardeners. Well, let’s cut through the suspense:

  • Yes, you absolutely can compost mushrooms.

Whether you’ve harvested a basket of wild mushrooms from a woodland adventure or you’re holding a handful of supermarket mushroom stems snapped from your dinner prep, they’re all set to be compost contributors.

So What’s the Deal?

  • Mushrooms, whether wild or edible, are completely compostable. In fact, they pack a punch in your compost heap.
  • Fresh mushrooms, cooked mushrooms, that old mushroom hiding behind your creamer – they can all go in.
  • Mushrooms are naturally packed with water content, which aids in decomposing.

Important: Even commercially grown mushrooms can be composted; it doesn’t have to be straight from the farmer’s market or your backyard garden!

However, remember that it’s not as simple as tossing those fungi into the pile. In the upcoming sections, we’ll get into the hows and whys of composting mushrooms. So, if you have mushroom scraps in your hand right now, hang tight! We’re all mushroomed up and ready to go!

Why Should You Compost Mushrooms?

When it comes to composting, understanding the right ingredients that can enrich your pile is a vital first step to creating a rich, nutritious compost. Some may frown upon the idea of composting mushrooms. In reality, these generous fungi carry unique benefits that can be a vault of fortune for your compost. Here’s why:

Nutrient Enrichment

  • Given their biological composition, mushrooms add essential minerals to your compost heap. Their body structures, made primarily of chitin, break down into nitrogen-rich compost.
  • Additionally, mushrooms are replete with high levels of potassium, phosphorus, and other essential minerals that fortify the compost with the essential nutrients crucial for plant growth.

Accelerated Composting Process

  • Mushrooms are already somewhat decomposed, courtesy of which they break down faster when added to the compost. This, in turn, accelerates the overall composting process.
  • Furthermore, the mycelium on the body of mushrooms, a type of fungus, can help in the speedy decomposition of other organic materials within your compost, acting as a catalyst in processing your compost pile.

Versatility in Compost

  • Whether we’re talking about the remains of edible mushrooms from your kitchen or wild mushrooms from your garden, all types are compostable. The provision to compost different varieties ensures that you don’t miss out on any valuable material for your compost bin.

Natural Fungal Component

  • Fungi play an essential role in any healthy compost heap, breaking down tough components like woody stems and leaves. You add a natural fungal component to your compost pile by incorporating mushrooms.

A Dash of Humus

  • As mushrooms decompose, they lend a helping hand in producing humus – a stable organic matter that amplifies the fertility of the soil. In the long run, this increases the soil’s water-holding capacity, thereby reducing the need for frequent watering.

Simply put, composting mushrooms is about more than just making good use of your waste. It’s about transforming it into a gold mine of nutrients your soil and garden will definitely thank you for.

How to Compost Mushrooms Properly

Composting mushrooms isn’t any different from composting any other organic waste. The only point to remember is to follow a structured method for the best results. So, without further ado, let’s delve into the steps to compost mushrooms successfully:

Gather Your Materials

  • Empty your vegetable bin and gather all of your mushroom trimmings and stems. These parts often get overlooked but can contribute to a richer compost.
  • You can compost other food waste from mushrooms, such as vegetable peelings, fruit cores, tea bags, coffee filters, and coffee grounds. Remember to avoid composting meat or dairy products as they attract pests.

Prepare the Compost Bin

  • Make sure your compost bin has adequate drainage. This minimizes the chance of having a soggy compost pile, which could smell foul and be poor in quality.
  • Add a layer of twigs or straw to line the bottom of your compost bin if there isn’t adequate aeration and to support drainage.

Layer Your Compost Pile

  • Compost piles are all about layers. Start with a green layer of kitchen waste, including your mushroom scraps.
  • Add a brown layer on top of the green layer. Brown materials include leaves, tea bags, coffee filters, cardboard, and paper.
  • Add another green layer on top. Continue the process of layering until the compost bin is full.

Turn Your Compost

  • To ensure proper decomposition, turning your compost every few weeks is important. Turning introduces more oxygen and aids decomposition, leading to faster composting.

Wait for the Magic to Happen

  • Allow some time for mushrooms and other kitchen waste to decompose and turn into nutrient-rich compost. This could take anywhere from a few weeks to several months, depending on the size of your heap and the climatic conditions.
  • Once the compost is dark and crumbly, it’s ready to use. You can read more about when to use your compost in this post: When is the best time to add compost to your garden?

This is it, folks! A few steps stand between your kitchen waste and a nourishing compost pile. Let’s all start conserving resources one mushroom at a time.

Some Warnings and Tips

Like any valuable practice, composting mushrooms comes with its own peculiarities and potential challenges. However, fear not! With the right insights and precautions, your composting journey can be both fruitful and trouble-free.


  • Potential for Spore Spread: While composting mushrooms, be aware that mature mushrooms carry spores that could potentially spread to other parts of your garden. This is less of an issue with edible varieties, but it could be a more significant concern if you’re composting wild or poisonous mushrooms. To prevent this, try composting mushrooms before they reach total maturity.
  • Beware of Mushroom Poisoning: Certain mushrooms, although toxic, pose no risk to compost. Always be sure to clean your hands and any tools you might use thoroughly.


  • Chop them up: Mushrooms, especially larger ones, will compost more quickly if you cut them up first. Smaller pieces break down faster, speeding up the overall composting process.
  • Balanced composting: Consistently add a mix of ‘green’ and ‘brown’ materials to your compost pile. Too much of one sort can slow down the composting process or make the compost too wet or too dry. Ideally, keep a ratio of 2:1 in favor of brown materials (like leaves and cardboard) to green waste (like kitchen scraps).
  • Monitor your compost: Regularly check your compost pile to ensure it’s not too wet or too dry and that it’s heating up as expected.
  • Turn it often: Turning your compost pile occasionally helps introduce oxygen, speeds up the decomposition, and helps create a consistent compost.

With these tips and warnings in hand, you can proceed with composting your mushrooms, knowing that you’re appropriately informed. Let’s turn composting into a household habit that benefits not just our gardens but also our planet.


In the comprehensive journey we’ve embarked on in this article, we’ve answered a resounding yes to the query – can you compost mushrooms? To sum up, we’ve learned:

  • Both wild and edible mushrooms can be composted.
  • Mushroom composting can enrich your compost pile with essential minerals and aid in decomposition.
  • Composting mushrooms involves more than just tossing them into the compost bin; it’s a systematic process that ensures maximum benefit from your compostable materials.
  • There are certain challenges to be aware of, and practical tips and guidelines to help you steer clear of these pitfalls towards successfully composting mushrooms.

Remember, nature and our efforts to compost correctly go hand in hand for a sustainable future. Composting mushrooms is indeed a step towards enhancing this symbiosis.

Frequently Asked Questions about Composting Mushrooms

Can you compost cooked mushrooms?

Yes, you can compost cooked mushrooms. Just ensure that they aren’t cooked with a lot of oil or sauces, as this can potentially attract unwanted pests to your compost bin.

Does mushroom compost smell?

Properly managed mushroom compost should not smell bad. An offensive odor could indicate that the compost is overly wet or that it is not getting enough oxygen.

What other food scraps can you compost with mushrooms?

Almost all vegetable and fruit peels, coffee grounds, tea bags, eggshells, and even some kinds of paper can be composted with mushrooms. However, it’s generally wise to avoid composting meat, dairy, and oily foods to prevent attracting pests.

Can mushroom compost be harmful to plants?

No, mushroom compost is not harmful to most plants. It infuses essential minerals into the soil. However, mixing mushroom compost with other compost is always recommended to create a balanced nutrient profile for your plants.

More Composting Tips You Will Love

I hope these beginner tips have helped you get started with composting! If you have any other questions, feel free to ask in the comments below. Happy composting!

Ren Lenhof

Hi there, I’m Ren! Welcome to the House Fur Blog. Life is never dull when you’re living in an 1888 Victorian with over 200 houseplants and two giant dogs – luckily, I know a thing or two about making it all work!

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