Mushroom Compost Bulk Bag

Our half tonne Mushroom Compost Bulk Bag is a great natural soil improver. Our formulation is a combination of wheat straw and horse manure composted together.

Using Mushroom Compost in your garden is a fantastic way to add some organic matter to your soil and is brilliant for your veg patch. Mushroom Compost is a rich source of organic matter, which enhances soil structure and promotes better water retention. It also improves nutrient content, providing essential elements for plant growth. Mushroom Compost also has natural disease-suppressive properties, reducing the risk of plant infections and promoting healthier plants. It contains beneficial microorganisms that enhance soil fertility and aid in nutrient uptake. Using Mushroom Compost is an eco-friendly choice, as it uses agricultural by-products that would otherwise go to waste. By incorporating mushroom compost, you can enhance your soil health, increase plant yields, and contribute to sustainable gardening practices.

The half tonne Mushroom Compost Bulk Bag is 85 x 85 x 85 and holds approx. 500kg with UK delivery direct to your door.

If you would like to order larger amounts, please contact us for prices and delivery times.

FAQs About Spent Mushroom Compost

What is spent mushroom compost?

Spent mushroom compost (SMC) is the byproduct of mushroom farming. It consists of organic materials such as straw, manure, gypsum, and other nutrients used in mushroom cultivation. After mushroom crops are harvested, the remaining compost is called "spent," but it still contains valuable nutrients for gardening and landscaping.

How is spent mushroom compost made?

Spent mushroom compost is created by mixing organic materials like straw, horse or poultry manure, and gypsum. These materials are composted, sterilized, and used as a growing medium for mushrooms. Once mushrooms have been harvested, the leftover compost is collected and repurposed for gardening.

What are the benefits of using spent mushroom compost?

• Improves soil structure and aeration
• Retains moisture, reducing the need for frequent watering
• Enriches soil with essential nutrients
• Helps suppress certain soil-borne diseases
• Acts as an eco-friendly alternative to chemical fertilizers

Is spent mushroom compost good for all plants?

Spent mushroom compost is beneficial for many plants, including vegetables, flowers, shrubs, and trees. However, it has a slightly alkaline pH, so it may not be ideal for acid-loving plants like blueberries, rhododendrons, and azaleas.

How do I use spent mushroom compost in my garden?

You can use spent mushroom compost as:

• A soil conditioner by mixing it into garden soil (1:3 ratio)
• A mulch by spreading it around plants to retain moisture
• A top dressing for lawns to improve soil health
• A potting mix additive when blended with other composts

Can spent mushroom compost burn plants?

Spent mushroom compost is generally safe for plants, but if used in large amounts, it may be too rich in salts, which can affect sensitive plants. To avoid this, mix it with other soil or let it age before applying.

Does spent mushroom compost smell bad?

No, properly processed spent mushroom compost has an earthy smell similar to fresh soil. If it has a strong ammonia or sulfur odor, it may not be fully aged or cured.

Is spent mushroom compost organic?

Spent mushroom compost is made from organic materials, but its organic certification depends on how it was produced. Some mushroom farms use non-organic inputs, so check with suppliers if you require certified organic compost.

Can I make my own spent mushroom compost?

Yes! If you grow mushrooms at home, you can reuse the leftover compost in your garden. Simply let it age for a few weeks before mixing it into your soil.