Is Mushroom Compost Good For Hydrangeas?

by Alex Kountry
Updated on

Mushroom compost is often used as a soil amendment or mulch, and it can be especially beneficial for hydrangeas. Here’s a look at why mushroom compost is good for hydrangeas and how to use it.

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What is Mushroom Compost?

Mushroom compost is a type of slow-release fertilizer made from mushroom manure. It is high in nitrogen and phosphorus, two important nutrients for plant growth. Mushroom compost can be used on a variety of plants, including hydrangeas.

Mushroom compost is made by supersaturating straw with nitrogen-rich manure, then adding mushrooms. The mushrooms help break down the straw and manure, making it easier for plants to absorb the nutrients. The finished compost is dark brown or black and has a crumbly texture. It should be used sparingly, as too much can damage plants.

When used as directed, mushroom compost can provide your hydrangeas with the nutrients they need to grow and bloom. Just be sure to take care not to overdo it!

What are the Benefits of Mushroom Compost?

Mushroom compost is a type of compost made from mushrooms. It is a great source of nutrients for plants and can help improve the drainage and aeration of soil. Mushroom compost can also help to suppress diseases and improve the overall health of your plants.

Mushroom Compost Adds Nutrients to the Soil

Mushroom compost is a byproduct of the mushroom growing process. The end result is a dark, earthy-smelling material that is rich in nutrients. Mushroom compost can be used as a soil amendment or as a mulch.

Mushroom compost is made from chopped straw, chicken manure, and other organic materials. The mixture is then inoculated with spores of the mushroom fungi. The spores germinate and the fungi begin to grow.

As the fungi grow, they break down the organic matter in the compost pile. This process releases nutrients that are essential for plant growth, including nitrogen, phosphorus, and potassium. Mushroom compost also contains small amounts of other micronutrients that are important for plant health.

Mushroom compost can be used as a soil amendment or as a mulch. When used as a soil amendment, mushroom compost should be mixed into the top 8-12 inches of soil. It can then be tilled into the soil before planting or left on the surface as a mulch.

Mushroom compost can also be used as a mulch around plants. Spread it around the base of plants being careful not to touch the plant stems or leaves. Mulching with mushroom compost will help to conserve moisture in the soil and suppress weed growth.

Mushroom Compost Improves Soil Structure

Mushroom compost is rich in organic matter, which improves soil structure and drainage while increasing water-holding capacity. This is especially beneficial in heavy clay soils that tend to be poorly drained. The addition of mushroom compost can help break up compacted soils, making them more loose and friable. Mushroom compost also helps retain nutrients and moisture in sandy soils that tend to have poor nutrient-holding capacity and drain quickly.

Mushroom Compost Increases Water Retention

Mushroom compost is rich in organic matter, which helps improve water retention in sandy soils. It can also help reduce water loss in well-drained soils during periods of extended drought. For plants that require consistently moist soil, mushroom compost can be used as a top dressing to help retain moisture around the roots.

How to Use Mushroom Compost

Mushroom compost is a type of garden compost made from mushrooms. It is a rich source of nutrients, which makes it ideal for use as a fertilizer or as a soil amendment. Mushroom compost can also help to improve drainage and aeration in heavy soils.


Mushroom compost can be used as a top-dress for your lawn. This is especially effective in the fall, as the compost will help your lawn to overwinter and prepare it for spring growth. Simply apply a thin layer of compost (no more than 1/2 inch) over the entire lawn surface, using a rake to spread it evenly. Water the compost in well, and you’re done!


Mushroom compost can provide a number of benefits to your garden, including improved drainage, increased moisture retention, and added nutrients. It can also be used as a side-dresser for garden plants, such as hydrangeas.

To side-dress with mushroom compost, simply apply a thin layer of compost around the base of the plant, being careful not to mound it too high. Water the compost in well and let the plant grow!

Amending Soil

Mushroom compost is an excellent material to use for amending soil, especially if the soil is sandy or clay-based. Mushroom compost is also good for hydrangeas. To use mushroom compost for amending soil, simply work it into the top few inches of the soil with a shovel or rake. Be sure to wear gloves when working with mushroom compost, as it can be quite muddy.

Are There Any Disadvantages to Using Mushroom Compost?

Although mushroom compost has a high concentration of nutrients, it also has a high level of pH. This can be beneficial for some plants, but for others, it can make the soil too alkaline. If you are planning to use mushroom compost on your hydrangeas, make sure to test the soil beforehand to ensure that the pH level is appropriate.

Mushroom compost is also very dense, so it is important to loosen it up before using it. You can do this by mixing it with other types of compost or by adding sand or perlite. If you don’t loosen it up, the roots of your plants will have difficulty penetrating the soil and getting the nutrients they need.

In Conclusion

Mushroom compost is an excellent soil amendment for hydrangeas. It is high in organic matter and helps to improve drainage and aeration in the soil. Mushroom compost also provides a source of slow-release nitrogen, which is essential for plant growth. Add mushroom compost to your hydrangea beds in early spring before new growth begins.

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About the author

Alex Kountry

Alex Kountry is the founder of HayFarmGuy and has been a backyard farmer for over 10 years. Since then he has decided to write helpful articles that will help you become a better backyard farmer and know what to do. He also loves to play tennis and read books


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