Mushroom Compost


Perfect for neutralising acidic soils, our high quality Spent Mushroom Compost is affordable and rich in essential minerals like phosphate and magnesium, and low in nitrogen - perfect for fostering strong and healthy plant growth. Ideal for year-round use as a moisture-retaining mulch or soil improver, this agricultural superhero is also especially brilliant at breaking up heavy clay soil - the holy grail of composts for our South East customers!

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Product Description

Discover the secret to a flourishing garden with our Spent Mushroom Compost, an exceptional soil enhancer designed to nourish and revitalise your garden’s soil. This compost is the ultimate natural solution for neutralising acidic soils, making it particularly beneficial for growing Brassica vegetables like broccoli and Brussels sprouts, as well as root vegetables and rose bushes. Its alkaline nature also makes it an excellent choice for the majority of flower beds, promoting vibrant and healthy blooms.

Its specific alkaline properties mean it’s not suitable for ericaceous (acid-loving) plants like rhododendrons, camellias, and azaleas, or for use in neutral, alkaline, or chalky soils. If you are looking for an Eco Friendly, recycled compost for your use in these areas, add a bag of our Green Compost (LINK) to your order, and get the best of both worlds – tailor made care for your garden!

Spent Mushroom Compost’s unique composition, low in soluble nitrogen yet rich in vital minerals like phosphate, potassium, calcium, and magnesium, ensures a balanced nutrient supply for your plants. This careful balance minimises the risk of plant burn, a common concern with many composts, while enhancing soil structure and moisture retention. It’s particularly effective in breaking up heavy soils, facilitating better root growth and reducing the likelihood of diseases such as clubroot.

For any further questions or tailored advice, our horticultural experts are just a call or message away, ready to assist you in making the most of our compost for your garden’s unique needs.

Perfect Your Soil’s pH

Treat your broccoli and Brussels sprouts to a deep conditioning treatment. Soil conditioning, that is! Alkaline in nature, mushroom compost is just the ticket for neutralising your soil, creating the ideal conditions for growing Brassica and root vegetables. It’s also beneficial for flower beds and rose bushes but do avoid using it with your ericaceous (acid-loving) plants.

Any questions? See our FAQs below or feel free to call us and speak to one of our horticultural experts.

Benefits & Uses


–        Nourishes your existing soil.

–        Improves soil structure and breaks up heavy soil.

–        Reduces risk of certain diseases (clubroot).

–        Retains moisture.

–        Reduces weed growth.

–        Promotes root health and growth.

–        Low salt content compared to other composts.

–        Low in soluble nitrogen (lower risk of plant burn).

–        High levels of phosphate, potassium, calcium & magnesium.

–        Element composition includes copper, zinc manganese, iron and boron.


–        Soil conditioning.

–        Neutralising acidic soil.

–        Weed suppressant mulching.

–        Ornamental gardens.

–        Tree and shrub planting.

–        Flower beds.

–        Great for growing:

  • Brassica vegetables (broccoli, kohlrabi, cauliflower, Brussels sprouts, kale)
  • Root vegetables
  • Rose bushes
Avoid with

‘-        Ericaceous (acid-loving) plants.

–        Rhododendrons, camellias and azaleas.

–        Heathers.

–        Fruit crops.

–        Lawn top dressing.

–        Neutral, alkaline or chalky soils.

Frequently Asked Questions

Q: What is Mushroom Compost?

A: Mushroom Compost is a by-product of the mushroom growing process. After the mushrooms are harvested, the remaining compost is rich in organic matter and nutrients, making it an excellent soil conditioner. It contains a blend of straw, peat, and other organic materials, along with vital plant nutrients.

Q: How does Mushroom Compost benefit my garden?

A: Mushroom Compost offers numerous benefits including improving soil structure, nourishing the soil, retaining moisture, reducing weed growth, and promoting root health. It’s particularly effective in neutralising acidic soils, making it ideal for growing certain vegetables and flowers.

Q: Can I use Mushroom Compost for all types of plants?

A: While Mushroom Compost is versatile, it’s not suitable for all plant types. Its alkaline nature makes it ideal for Brassica vegetables, root vegetables, and rose bushes. However, it should be avoided with ericaceous (acid-loving) plants like rhododendrons and azaleas.

Q: How should I apply Mushroom Compost to my garden?

A: Mushroom Compost can be used as a mulch, spread on the surface of the soil, or mixed into the soil to improve its quality. When using mulch, a layer of 2-3 inches is recommended. For soil improvement, mix it into the top 6-12 inches of soil.

Q: Is Mushroom Compost safe for organic gardening?

A: Yes, Mushroom Compost is safe for organic gardening. It is a natural product, high in organic content that enhances soil health without the use of synthetic chemicals.

Q: How often should I apply Mushroom Compost to my garden?

A: The frequency of application depends on your soil condition and gardening goals. Generally, applying once or twice a year is sufficient. For specific advice, feel free to contact our horticultural experts.


Free local delivery:

We offer free delivery within our local zone (15-17 mile radius of Paddock Wood, including Tonbridge, Tunbridge Wells, Edenbridge, Pembury, Sevenoaks, Borough Green, East Peckham, West Malling, Maidstone, Aylesford, Loose, Crowborough, Wadhurst, Lamberhurst, Hawkhurst, Staplehurst and Crankbrook) when you order any size bulk bag.

Our local delivery covers these postcodes: TN1, TN2, TN3, TN4, TN5, TN6, TN7, TN8, TN9, TN10, TN11, TN12, TN13, TN14, TN15, TN17, TN18, TN19, TN20, ME14, ME15, ME16, ME17, ME18, ME19, ME20.

Delivery will be made by a Corker Hiab lorry (with mounted crane). Please enter your postcode in the basket to check if you qualify for free delivery!

Drop Off Delivery

There is a £40 delivery charge for orders without a bulk bag in our local zone. When a bulk bag is added to the cart, the order will qualify for free local delivery and the £40 charge will automatically be removed.

Pallet Delivery

For deliveries outside of our local zone (17-mile radius of Paddock Wood) we send items out via a trusted third-party courier service. The price for pallet delivery outside our zone is £72.00 (2-3 days).

Parcel Delivery

Orders weighing less than 30kg will be sent via a trusted third-party courier service. The price for a parcel under 30kg is £14.40 (2-3 days) and £15.99 (next day).

Discover further details about our delivery