[Best Guide]: Is Mushroom Compost Good For Tomatoes | 5 Facts

If you are wondering, “is mushroom compost good for tomatoes“, you will love this in-depth guide.

First of all, let me tell you that mushroom compost is an organic slow-release plant fertilizer.

This fertilizer improves the soil and growing conditions. Later, I will explain this to you as well.

But first, let’s talk about mushroom compost in detail.

What is Mushroom Compost?

In simple words, compost is decayed organic matter.

Let’s say you have leftover food, dead leaves, lawn trimmings or dead plant matter. Aerobic and biological bacteria turn it into compost.

Now you might be wondering, is mushroom compost made of mushrooms?


  • It is produced from poultry manure, straw, corn cobs, peat moss, lime, and gypsum compounds.

The mushroom compost ranges from 28-34% poultry litter, 60-70% straw, and 2-4.5% gypsum.

is mushroom compost good for tomatoes

Important Note: The composition of mushroom compost can vary as well.

As I mentioned above, it can be defined as slow-release organic fertilizer.

Remember that slow-release fertilizers release nutrients steadily over a course of time.

Over here, let me tell you something about mushroom compost.

It is widely used because of its ability to neutralize acid soils. Although tomatoes prefer slightly acidic soil, the calcium content is important for the tomato plant.

I will explain this to you later in this article.

  • The NPK ratio of mushroom compost is generally 1-1-1.

In this case, it works as a balanced fertilizer. Let me explain.

What does “1-1-1” Mean?

This number shows the percentage of three primary macronutrients.

So this NPK ratio shows that mushroom compost contains 1% Nitrogen, 1% Phosphorus and 1% Potassium.

Here’s why they are important.


It is a source of energy for metabolic reactions such as photosynthesis, nitrogen fixation and respiration.

Plus, plants make complex molecules like DNA, nucleic acid and amino acids using nitrogen. It also enhances the function of chlorophyll.


Here’s how phosphorus is important for tomatoes.

It is an essential component of ATP (Adenosine triphosphate).

Now you might be wondering, what is ATP?

It is the “energy unit” of plants. In simple words, this structure provides energy to the plant.

The major function of phosphorus is that it supports the shoot and root system of the plant.

Plus, it leads to flower and fruit development as well. This is because it is responsible for crop maturity at the right time.

Pretty simple, isn’t it?


This nutrient is extremely important for plants. Can you guess why is this so?

Potassium enhances the process of photosynthesis by regulating the opening and closing of stomata.

Moreover, it is involved in the movement of water, carbohydrates and nutrients. It increases root growth and improves drought tolerance as well.

Pretty important for tomatoes, right? Note that this percentage varies.

Now, back to our topic.

Is Mushroom Compost Good For Tomatoes

Unsurprisingly, mushroom compost is the best choice to grow mushrooms.

But, what about tomatoes? Here’s what you should know.

Overview: Is mushroom compost good for tomatoes? Yes! It is great for tomatoes. The high calcium content protects your tomatoes from blossom-end rot disease. It helps with water retention and is great against tomato leaf mold. Since it is made up of all-natural ingredients (organic), it is good for the environment.

  • Mushroom compost is rich in calcium.

Remember that tomatoes suffer from blossom-end rot due to calcium deficiency. But, what exactly is blossom-end rot?

is mushroom compost good for tomatoes

This disorder can dramatically reduce your tomato quality and quantity. Remember that it is not caused by bacteria, fungi or other pathogens.

It is a physical disorder caused by freezing, drought and other stressors. Now the question is, how can you identify it?

You can easily identify it as a brown, leathery rot developing around the blossom end of the tomato. This increases over time as the condition worsens.

Note: The calcium content makes mushroom compost alkaline in nature.

This takes us straight to our next point.

  • It helps with water retention.

I have a question for you. Why is this important for tomatoes?

The idea over here is that water retention ensures that your tomatoes do not lack water.

This is because the absence of water will cause the tomato plant to dry out, making it vulnerable to blossom end rot disease.

So the water holding capacity of mushroom compost prevents this.

This allows your plants to obtain some water from the soil even if you are unable to water them.

Amazing isn’t it?

  • It offers extra protection.

Let me explain.

We know that mushroom compost has a high nutrient capacity. Moreover, the composting process eliminates bacteria.

This eliminates the possibility of tomato leaf mold.

Tomato leaf mold is a disease in which that directly affects the foliage of the plant. This infection can cause the infected leaves to wither and die.

Remember that in some extreme cases, it may also impact blossoms and fruit.

Here’s the takeaway from this.

Mushroom compost ensures that you have beautiful tomatoes at harvest time.

  • It works great as food for tomatoes.

Let me make this simple for you.

The fact is that mushroom compost provides adequate nutrition to your plant. Along with nitrogen, phosphorus and potassium, it provides calcium, iron and magnesium as well.

This will help you produce top-quality tomatoes.

The best part?

Being an organic fertilizer, it is better for the environment as well. A plus point, right?

  • It is organic.

The word organic makes mushroom compost extremely “powerful”.

It is made up of all-natural ingredients, such as hay, peat moss and chicken manure.

The best part?

Inorganic fertilizers, such as an 8-8-8 fertilizer for tomatoes, are not the best choice for the environment.

But, mushroom compost is safe to use. You do not have to worry about chemicals seeping into your tomatoes.

So, let me summarise all this for you.

Summary: Is mushroom compost good for tomatoes? Yes, it is. The calcium content protects tomatoes from blossom-end rot disease. Due to its good water retention, it prevents your tomato plant from “drying out“. Since it is made up of all-natural ingredients (organic), it is good for the environment.

This takes us straight to our next topic, the advantages of mushroom compost.

Benefits of Mushroom Compost:

The real question is, is mushroom compost worth using?

Let’s find out.

  • It reduces dependency on chemical fertilizers.

The truth is that there are multiple problems related to chemical (inorganic) fertilizers. Here’s an example.

Instead of soaking deep into the roots, they may crust on top of the soil. Moreover, they do not enrich your soil in the long term.

is mushroom compost good for tomatoes

Remember that chemical fertilizers are made up of harmful chemicals. These chemicals cause soil and water pollution.

But, we know that compost improves soil structure by providing essential nutrients.

This reduces the need for chemical fertilizers to fulfil the nutrient requirement.

To summarise, mushroom compost is a good alternative to chemical fertilizers.

  • It improves the soil structure.

Here’s why.

Usually, mushroom compost has a straw base. This means that it improves the drainage of the soil.

As we discussed earlier, mushroom compost is a good soil conditioner. It enriches the soil by providing the essential nutrients to the plants.

Plus, it improves the water-holding capacity of the soil. This decreases the need for watering.

Important Note: Mushroom compost attracts worms. They improve soil structure and the ability of the roots to consume more nutrients.

Pretty amazing, isn’t it?

  • The application process is simple.

If we talk about chemical fertilizers, you have to apply them over time. But, you can apply compost only once.

Typically, you should add compost to your soil in spring every year. You can also add it during the fall.

The idea is that compost should be added at the start of the growing season.

Must Read: 10 Benefits of Composting in Agriculture

  • Good composting lowers greenhouse gas emissions.

This is something extremely important to consider when planning to use mushroom compost.

Remember that greenhouse gases trap heat in the atmosphere. As a result, the temperature increases. These gases include:

  1. Carbon dioxide
  1. Methane
  1. Nitrous Oxide

Let’s talk about compost generally.

If compost undergoes aerobic decomposition, methane emission reduces. This is because methane-producing microbes are absent in the presence of oxygen.

It also improves carbon sequestration (a process of storing and capturing atmospheric CO2) in the soil.

As it is eco-friendly, many people use it to grow tomatoes.

  • You can use it as an effective mulch.

Let me explain.

We know that mulch is a layer of material added to the soil surface. It improves the fertility of the soil, conserves soil moisture and reduces weed growth.

Remember that it acts as an insulating barrier against evaporation from wind and heat.

Simple, right?

  • The nutrients present in it improve fruit growth.

Talking about tomatoes, mushroom compost can maximise its growth if added in spring.

This is done by balancing soil density.

Balancing soil density:

If the soil is too tight, compost helps to loosen the soil. In the same way, loose soils are “clumped” together.

The point is that this balancing allows the plant to develop healthier roots. Great for tomatoes!

So, here’s the summary of the benefits of mushroom compost:


  1. It reduces dependency on chemical fertilizers.
  1. It improves the soil structure and water retention.
  1. Mushroom compost has a high calcium content.
  1. You can use it as an effective mulch.
  1. It attracts Earthworms.

Now the question is, how to make mushroom compost at home?

How to make mushroom compost at home?

If you want to make mushroom compost at home, here’s a simple guide.

How to make mushroom compost at home
  • Firstly, you should wet the pile of hay or horse bedding.

Then, ensure that it is wet for the next 24-48 hours until it absorbs water like a sponge.

  • Mix horse manure with gypsum. Then, add a little bit to the straw.

Note: Straw refers to wheat straw, hay, corncobs, or horse stable bedding.

Over here, you should mix everything evenly and cover it with a black plastic sheet.

  • Now, wait for 2 weeks until your pile reaches between 140-160°F (60°C-71°C).

Once the temperature has been reached, mix it thoroughly by moving the outer material to the centre. Then, water it thoroughly.

Now, you should let the pile sit for 5-7 days before using it. This ensures that the pile cools down.

Now, let me show you how to use mushroom compost?

How and when to use mushroom compost?

Before talking about this topic, here’s what you should know:

You should conduct a soil test. Let me explain.

As the word suggests, this test will inform you about the condition of your soil. As a result, you will make better decisions for your plant growth.

Now back to the topic.

Remember that there are multiple ways to use compost. But, here’s a simple guide for you.

  • First of all, mix compost with the soil.

Can you tell me why is this important?

This ensures that the soil receives nutrients. When you add a thick layer of compost on top of the soil, the worms and other creatures allow the compost to meld with the soil.

  • Talking about tomato plants, use compost every two to three weeks after plantation.

At this time, mushroom compost will improve the soil structure, root development and disease resistance.

Great for your tomatoes, isn’t it?

  • For tomatoes, 30% compost to the overall soil mix will be ideal.

This application can vary as well.

Further reading:

When to fertilize lawn in Florida | Best Guide

Ammonium Sulfate Fertilizer | 5 Amazing Uses

The idea is that too much mushroom compost can “burn” your plant as well. With this, let’s move straight to our next topic.

Is mushroom compost good for lawns?

If you are planning to use mushroom compost for tomatoes, you may consider your lawn as well.

The quick answer: Yes, this organic option can work great for lawns. Let me explain.

As we have already discussed, its water-holding capacity is great for lawns. Being a slow-release organic fertilizer, it will provide nutrients to your lawn over time.

Is mushroom compost good for lawns

The best part?

It will also prevent weed and other diseases.

So here’s the takeaway.

Mushroom compost is great for lawns. As it is organic, you do not have to worry about chemicals seeping into your lawn.

Is mushroom compost good for strawberries?

We all love strawberries, right?

But, do strawberries like mushroom compost? Here’s what you should know.

Yes, it is great for strawberries.

This is because it provides moisture for growing strawberries. Remember that this moisture is essential for strawberries.

Moreover, it is a source of nitrogen, phosphorus, potassium and other nutrients. Earlier, we discussed the importance of these macronutrients.

You should know that mushroom compost improves the drainage of the soil. This is useful when growing strawberries in rainfall.

So here’s the takeaway.

Mushroom compost makes your strawberries more flavourful and tasteful. This is because it has special enzymes which break down sugars in the fruit.

Note After the application, it will take up to 3 weeks for strawberries to absorb the nutrients.

Here’s a simple table for you.

Plants that like mushroom compost:Plants that DO NOT like mushroom compost:
Butterfly weedBlueberries
Chinese silver grassesHydrangeas

Wrapping Up:

So there you have it. Is mushroom compost good for tomatoes? Yes, it is great for tomatoes.

We can use inorganic fertilizers as well. However, there are multiple problems associated with them.

So this organic option will increase productivity by improving your soil condition.

To recap, the mild nitrogen and high calcium content make it a good fit for tomatoes, strawberries and lawns. We also discussed the simple application process.

If you have any questions, feel free to get in touch. Stay tuned for more.

[Best Guide]: Is Mushroom Compost Good For Tomatoes | 5 Facts

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