How to: Using Mushroom Compost in Raised Beds?

Using mushroom compost in raised beds is just simple and effective by applying a layer of compost around 2-3 inches deep during every growing season. Ensure the compost is evenly spread across the bed’s surface.

Gardeners who love nature and prefer using fertilizers without chemicals often explore options like mushroom compost for their raised beds. Mushroom compost is an organic compost that provides great benefits, adding nutrient-rich goodness to your plant.

Using mushroom compost gives your raised bed plants a natural and wholesome source of nourishment. It is a simple and effective way to promote healthy growth in your garden while avoiding harmful chemicals.

What is Mushroom Compost?

mushroom compost in raised beds

Mushroom compost is a unique blend of materials for cultivating mushrooms such as straw, peat moss, and organic substances. This serves as a soil enhancer and a slow-release fertilizer.

It undergoes a strict heat-treatment process to eliminate fungi and weed seeds, ensuring safety for your garden. This nutrient-rich compost provides essential elements like nitrogen, phosphorus, potassium, calcium, and minerals, promoting vigorous plant growth. 

Nutrients in mushroom compost

Mushroom compost holds essential nutrients that contribute to the health of your plants. This organic blend acts as a natural source of nourishment, supporting robust growth and vibrant plant health. Let’s explore in detail now – 

A Balanced Nutrient Boost

Mushroom compost is loaded with essential nutrients – nitrogen, phosphorus, potassium, calcium, and other minerals. These elements work together to promote healthy plant development, from root growth to foliage and flower production.

Root Health and Development

The presence of nitrogen in mushroom compost promotes strong root growth and foliage. Phosphorus aids in root building and enhances flower formation whereas potassium contributes to overall plant life and disease resistance.

Enhanced Nutrient Availability

Mushroom compost not only supplies nutrients but also improves their availability in the soil. The organic matter in the compost acts as a sponge, retaining moisture and preventing nutrients leak. 

How to Use Mushroom Compost in Raised Beds?

Using mushroom compost in your raised beds is an excellent way to enhance plant growth and nourish your garden naturally. Let’s see in detail how to use them in raised beds – 

Prepare the Raised Beds

Before adding mushroom compost, ensure your raised beds are properly prepared. Clear any weeds, or debris from the beds. 

Adding Mushroom Compost

Once the raised beds are ready, spread a layer of mushroom compost evenly over the surface. Aim for a depth of approximately 2-3 inches ensuring thorough even distribution. Avoid compacting the soil as you do this.


After adding the mushroom compost, you can proceed with planting your desired plants or seeds. Make sure to follow the recommended planting depth and spacing for each plant. Water the beds thoroughly to help the compost settle and begin releasing its beneficial nutrients.

Reapply in the growing season

To maintain the nutrient levels in your raised beds, consider reapplying a layer of mushroom compost every growing season. Adding a fresh layer of compost annually ensures a continuous supply of organic matter and nutrients for your plants.


Check the moisture levels in your raised beds and water accordingly. Mushroom compost helps retain moisture, but it’s vital to provide adequate hydration to support plant growth.

Also Read: How far Apart to Plant Tomatoes in a Raised bed?

Advantages of using mushroom compost

Using mushroom compost in your garden is a good choice that offers numerous benefits. Let’s see what benefits it can give us – 

Nutrient-Rich Boost

Mushroom compost has nutrients that provide essential elements like nitrogen, phosphorus, potassium, and minerals. These nutrients nourish your plants, promoting robust growth, vibrant foliage, and blooms. 

Soil Enrichment and Structure

The organic matter in mushroom compost enhances soil structure, improving water retention, drainage, and aeration. It encourages the development of beneficial soil microorganisms, which contribute to nutrient cycling and a healthier soil ecosystem. 

Weed Suppression

The thick texture of mushroom compost acts as a natural weed deterrent, helping to suppress weed growth in your garden beds

Moisture Retention

Mushroom compost acts like a sponge as mentioned above, absorbing and retaining moisture in the soil. This can be especially beneficial in dry or arid climates, as it helps conserve water and reduces the frequency of watering. 

Environmentally Friendly

Mushroom compost is an eco-friendly alternative to synthetic fertilizers. By using mushroom compost, you are making a positive environmental impact.

Work as a protective layer

Mushroom compost can also serve as a warm cover for your plants. When used as a protective layer, it helps to retain heat in the soil, keeping your plants cosy and safeguarded from cold temperatures.

Disadvantages of using mushroom compost

While mushroom compost offers numerous benefits but be aware of the disadvantages that come with its use.

You can’t use mushroom compost in salt-sensitive plant

Mushroom compost may not be suitable for plants that are sensitive to high salt levels. Due to its composition, mushroom compost can contain higher salt content, which can hinder the growth of salt-sensitive plants and lead to leaf burn.

Long waiting period

One drawback of using mushroom compost is the extended ageing period it requires. Unlike store-bought compost, homemade mushroom compost needs to be aged. This waiting period allows the compost to fully decompose, stabilize, and become suitable for use in your garden. 

Drainage concerns

Mushroom compost can interfere with drainage in certain soil types. Excessive use of mushroom compost or using it in areas with poor drainage can lead to waterlogging and an increased risk of fungal infections or decay, particularly in water-sensitive plants.

Check this out: Why Are My Radishes Long and Thin?

Homemade Mushroom Compost

After learning about the benefits of mushroom compost and how to use it, let’s explore how to make it at home –

Organic Ingredients

Mushroom compost relies on a carefully selected blend of organic materials. While ingredients may vary by region, the most common ones include wheat straw, hay, corncobs, horse or poultry manure, and gypsum, and others include peat moss, soybean meal, or other organic matter. The thing is to choose materials that can break down quickly and provide the necessary nutrients.

Heating Process for 2 weeks

Heat plays a vital role in the mushroom composting process. The target is to surpass the temperature of 160 degrees Fahrenheit in your compost pile and maintain it for a few more days.

The heat generated by the composting process helps break down the organic matter rapidly, encouraging the growth of beneficial bacteria and eliminating weed seeds and harmful organisms present in the compost.

Hot composting

During the hot compost process, it’s crucial to turn the compost pile every day or two. This essential step introduces much-needed air into the pile, facilitating decomposition.

Additionally, regular moisture is vital, achieved by gently spraying the pile and maintaining an ideal moisture level for efficient decomposition.

Ageing and Curing

After approximately two weeks of hot composting, the time has come to age and cure the compost further. Create a separate secondary pile with the compost and allow it to age for a couple of weeks.

During this period, the compost gradually darkens in colour, indicating further breakdown and decomposition. The goal here is not to restart the hot composting process but rather to promote gradual breakdown and change.


Unlike the hot compost pile, the secondary pile does not require regular turning. Instead, focus on keeping it moist by providing occasional watering. Once the secondary pile has completed its transformation, your mushroom compost is ready.

Also Read: How to Use Worm Castings in Vegetable Garden?


Adding mushroom compost to your raised beds can be a game-changer for your gardening success. By following the above simple steps of adding a layer of mushroom compost to your raised beds every growing season, you can provide your plants with a nutrient-rich boost.

The organic nature of mushroom compost makes it a safe and environmentally friendly choice, aligning with your love for nature and chemical-free fertilizers.

Mushroom compost works as a gardening ally, enhancing soil fertility, promoting optimal moisture levels, and nurturing vibrant plant growth. 

Leave a Comment