• 1 x Builders Bag Approx 700L
    £95.00
    £79.17 ex. VAT
  • 10 x 75L Bags Approx 750L
    £105.00
    £87.50 ex. VAT
  • 1 x Bulk Bag Approx 1000L
    £115.00
    £95.83 ex. VAT
  • 20 x 75L Bags Approx 1500L
    £130.00
    £108.33 ex. VAT
  • 1 x XL Bag Approx 1200L
    £130.00
    £108.33 ex. VAT
  • 30 x 75L Bags Approx 2250L
    £160.00
    £133.33 ex. VAT
  • 40 x 75L Bags Approx 3000L Larger rigid vehicle required.
    £185.00
    £154.17 ex. VAT
  • Loose loads available for orders over 15M3 Please contact us to see how much you could save on a loose load.
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Mushroom Compost Calculator

Length (cm) x Width (cm) x Depth (cm)
= 1000 Litres OR 1M3
Please Note: The calculator figures above do not account for settlement. For soft materials such as barks and composts etc please add approx 10-20% settlement.

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Mushroom Compost

Economical Mushroom Compost Rich in Organic Matter

Mushroom compost is an efficient, economical way to condition your soil, improving the quality and nutrient value of the soil it is added to, and promoting improved growth of plants.

CPA Horticulture's mushroom compost is composed of composted agricultural straw and rotted manure, resulting in compost that is easy to crumble, spread and work with. Thanks to the compost's chemical and physical composition, it is perfect for improving the texture of heavy clay soils, or adding humus to nutrient deficient soils.

What's more, as our compost is fully steam sterilised before leaving the mushroom farm, it will not introduce any weeds or other pests to your site.

For general soil improvement a 50mm layer should be spread over the area to be treated, then forked or rotavated in. A 75mm layer could be considered with very poor soils.

Mushroom Compost: The Benefits

  • Easy to spread
  • Increases your soil's physical structure
  • Increases the level of organic material in your soil
  • Suitable for use by landscaping professionals and home gardeners
  • Very economical
  • Steam sterilised
  • Weed free

Product Composition

  • Mid-brown in colour
  • Blended agricultural straw and animal manure

CPA Horticulture's mushroom compost is available in bulk loose loads and bags, and can be delivered anywhere across the mainland UK. 

For a full technical analysis, please contact CPA Horticulture. 

More Information

Please Note: Mushroom Compost is very rich substrate and should be mixed with soil before planting. It is not suitable or recommended for potting, seeding, young plants or to be used as a direct growing medium. Results may vary.  We would recommend Multipurpose Compost or John Innes for these applications.

Mushroom Compost is a by-product of the mushroom growing industry. Whilst we test the material regularly, CPA Horticulture does not produce the mushroom compost directly and as such cannot ever guarantee the ingredient, chemical or nutrient composition found in the compost.  Mushroom Compost is a natural product, and its colours and textures will vary depending how fresh the compost is. Fresh mushroom compost is lighter in colour with more visible straw which will darken and decompose naturally. Mushroom Compost on rare occassion can contain trace amounts of plastic (gloves/food tray linings etc) which are unavoidable and come in directly from the Mushroom Farm.

Mushroom compost will be delivered in a compacted state and should be broken up.

Analysis
pH Level 6.5-7
% Organic Matter 66%
Ammonia - N 126 Mg/l (Fresh) / 0.26%
Magnesium 204 Mg/l (Fresh) / 0.4%
Nitrate - N 41 Mg/l (Fresh) / 0.08%
Phosphorus 1480 Mg/l (Fresh) / 0.6%
Potassium 1480 Mg/l (Fresh) / 3.1%
total Nitrogen (N) 2.4%
Product Code: MC
Availability: In Stock
1139 reviews (4.9/5)  1139 Reviews  
Tom from Rotherham on 16/04/2024
1139 reviews
Good quality mushroom compost
Liam from on 12/04/2024
1139 reviews
Delivery service really good, compost is a bit more straw heavy than expected but I'm sure all will be fine! Great price!
Jacklyn Case from Wincanton on 10/04/2024
1139 reviews
An excellent mulch that really improved our soil quality
Peter from Chawton on 10/04/2024
1139 reviews
Good product, arrived on time and very helpful and friendly driver.
Alison Dodd from Sleaford on 08/04/2024
1139 reviews
Practical size bags made it easy to place them on our newly dug borders. Husband thought I had ordered too much, but I now think I needed twice as much! Seemed good quality, no problems with delivery which was on time & efficient. Will probably be back for more before too long.
Richard Sampson from Fishguard on 08/04/2024
1139 reviews
Excellent product, improving my soil with each application, Delivery excellent
Richard Sampson from Fishguard on 08/04/2024
1139 reviews
Delivery excellent, driver from Y Fenni very helpful. Product great for veg beds which I don’t dig, Soil quality improving with the addition of your compost.
Ian Scott from STOCKTON-ON-TEES on 08/04/2024
1139 reviews
The mushroom compost is a lovely product, very easy to apply as a mulch. Delivery was on time and the driver put the two pallets exactly where required.
Softscape Gardens Ltd from Cambridge on 08/04/2024
1139 reviews
I've been using this product for my job for years and it's a great soil imporver.
Sally from Rutland on 05/04/2024
1139 reviews
Another good delivery of mushroom compost. I have been using it for a few years and it has dramatically improved my soil down the allotment and in turn my veggies are fantastic, I have beautiful cauliflowers and massive pumpkins. And all the bags arrived intact.
John S from Rotherham on 01/04/2024
1139 reviews
Delivery was efficient and pretty much on the promised day and time, only one slightly ripped sack out of 40 and the compost looks very good. I have spread six bags already and just two small pieces of wood found, everything else is top quality. At a delivered price of less than £5 per 75 litre bag that is very good value for money. The empty sacks will also come in handy for composting leaves over the winter!
terry phillips from Bristol on 28/03/2024
1139 reviews
The mushroom compost provided was excellent, free of stones and containing all the organic material I had hoped for. Delivery was prompt and efficient and I would definitely use CPA Horticulture again
Jonathan from Ross on Wye on 28/03/2024
1139 reviews
After three years of use I can say with confidence that CPA Horticulture provides an excellent service. The goods are exactly as advertised, arrive on time exactly as promised and the communications are first class. Best of all, if questions or problems arise the customer service is always a pleasure to communicate with and thoroughly helpful in response. Finally the lorry driver who delivered a pallet of compost recently managed to solve a tricky placement problem no other driver has solved, quickly and very skilfully. This saved me a great deal of effort.
Lucy from Towcester on 28/03/2024
1139 reviews
This is my third or fourth batch of mushroom compost. It’s brilliant for mulching and also for mixing with my heavy clay soil to break it up a bit. Highly recommend.
Paul from Birmingham on 28/03/2024
1139 reviews
I ordered mushroom compost. It's really good stuff - exactly what I wanted to improve a heavy clay soil. The order was delivered promptly and on time with no fuss. The delivery communication was clear. I was able to get a narrow delivery time window and the delivery driver put it exactly where I wanted it which made all the difference. I plan to use again!
Andrew Jennings from Bristol on 25/03/2024
1139 reviews
Great Service & Great Compost.
ray from glos on 25/03/2024
1139 reviews
very pleased with the mushroom compost excellent service from start to finish will be ordering again in the very near future
RAYMOND SHURMER from glos on 25/03/2024
1139 reviews
very pleased with the mushroom compost very good service from start to finish
RAYMOND SHURMER from glos on 25/03/2024
1139 reviews
excellent from start to finish will buy again
Paula Havard from Malvern on 23/03/2024
1139 reviews
The wrong post code was put on the delivery and the driver had a job to find me this is not the first time it’s happened
P Jones from Crewe on 23/03/2024
1139 reviews
Excellent product. First class service. Delivery courier superb.
Paul Jones from Crewe on 23/03/2024
1139 reviews
Excellent product, service and delivery. Courier was very helpful and delivery prompt. First class service.
rfas from Cumbria on 19/03/2024
1139 reviews
This is our second year of ordering mushroom compost and not disappointed. Great for improving the vegetable plot resulting in a great crop of pumpkins, some very clean potatoes grown in sacks and even our roses liked it. Easy to handle and other than a few stones, free of plastic and other rubbish often found in compost. Would buy again.
Sue from Mid Wales on 19/03/2024
1139 reviews
Compost arrived on time and is as good as ever. Brilliant stuff for soil improvement before planting and for mulching crops too. Lightweight and easy to move around in the garden, with no unpleasant smells.
Anne McDermott from Wisbech on 18/03/2024
1139 reviews
The mushroom compost is excellent value for money. It was delivered on the date promised. It is good quality and I have also ordered in the past. I would recomment CPA to anyone.
Mr A HAWKINS from Bedfordshire on 17/03/2024
1139 reviews
Office staff were very quick to get back to me to confirm the delivery time on the morning. The delivery driver was courteous and dropped off the pallet exactly where I wanted it. I used the mushroom compost last year with good results and have no doubt that I will enjoy another good year in the allotment. Thank you to all involved.
Dean J from Lowestoft on 16/03/2024
1139 reviews
Good product, although I think because it was ordered in bags and not loose it seemed a bit compacted and had some big lumps in but all round seems a quality product, off the pallet the bags were very warm so great if you want to heat the ground where you plan to do early crops/planting out or stack and add some warmth to the greenhouse. Overall good service
Brian from Horley on 14/03/2024
1139 reviews
Excellent service from your courier; Palletways Initial bags of compost look of excellent quality Lets see what the growing season brings!
Kevin from Swansea on 13/03/2024
1139 reviews
Not the first time that I've used this compost from CPA Horticulture. The quality of the compost is excellent and great service from ordering to delivery. Will continue to use in the future.
Ian from North Walsham on 12/03/2024
1139 reviews
Palletways driver was MORE than helpful. The time slot advised was not accurate, causing us to think delivery was hours late, but this is often the case apparently! Palletways should sort that! Compost was well wrapped and bags clean, so re-transporting from our house to allotment kept the car clean. Product looked (and smelled) "right", hope it grows us some good vegetables etc.
Judy from Sutton on 12/03/2024
1139 reviews
Lovely rich compost delivered promptly
Ceri from SWANSEA on 10/03/2024
1139 reviews
Very happy with my delivery of spent mushroom compost. Good quality product which looks great on my borders as a mulch. Delivered by a really nice and helpful chap.
A Harding from Willmslow on 06/03/2024
1139 reviews
Product as described and staff, extremely helpful on delivery
Charlie from Bath on 01/03/2024
1139 reviews
Lovely Product with minimal plastic compared to other suppliers i have used in the past. Friendly team who were very helpful arranging delivery and contacting delivery company to chase up my order. I will definitely be back!
Rob from Barton on Humber on 28/02/2024
1139 reviews
Excellent product, well priced & delivered when required. Will use again & highly recommend this company.
MR PHILIP JONES from SALE on 26/02/2024
1139 reviews
Good product at a reasonable price delivered promptly
David Cooper from Lincoln on 21/02/2024
1139 reviews
As always a good quality product, and delivery service. The beds are all covered and its starting to degrade and feed them 5*
Andrew from Oxford on 20/02/2024
1139 reviews
Excellent product and the plants loving the attention! Delivery service was very good & delivery drivers particularly helpful.
Steve from Southampton on 19/02/2024
1139 reviews
Excellent Service, good compost, well seasoned so not too much smell.
Sue S from Rustington on 19/02/2024
1139 reviews
Very pleased with pallet of 40 X 70L mushroom compost. Well rotted. Will purchase again. The bags are quite heavy to move. (I am 78). I dropped them into a barrow.
Harry T from Wales on 17/02/2024
1139 reviews
I ordered 2 off 40x70 litre pallets. The midWales driver from Palletways was most helpful: he managed to reverse a 9'6" truck into our 10 ft wide drive first go, and put the pallets exactly where I wanted them, close to the veg garden, so I hadn't too far to barrow the sacks. (Fyi, they weighed about 23 kilos each, so it was good exercise.) Communication was excellent and I had several communications (phone calls and emails) giving updated info on delivery day. The compost looks good and friable, with rather a sweet smell. Now all I need is some dry weather so that I can spread it.
Lee.S. from Toddington on 17/02/2024
1139 reviews
Very happy indeed, delivery was hassle free and the 'pallets Way' guy was brilliant. The compost was/is brilliant no lumps of chalk at all actually there's very little chalk to be found. It spreads out easily using a fork/rake and also digs in well with good coverage. The compost is very active. You can feel the heat from within the pallet as you unload.I fully expect my allotment veg beds to 100% reinvigorated for the foreseeable future along with my new plant house beds where i've gone for 1 part mushroom compost to two parts standard compost along with a 25l bag of top soil per bed. I would wholeheartedly recommend this product on everything from value for money to quality.
John Wilkinson from East Yorkshirel on 15/02/2024
1139 reviews
Excellent composting material for mulch and soil improvement. The delivery arrangements went without problems, punctual and the pallet load placed exactly where I asked, and a very helpful delivery driver. I will be repeating this order very soon.
Paul from Benfleet on 13/02/2024
1139 reviews
First purchase and more than happy with the quality, arrived when said, when we spoke on the phone they were very helpful
Sue from Builth Wells on 12/02/2024
1139 reviews
Great service, great product and prompt efficient delivery. Highly recommended
Ernie Wells from Market Harborough on 09/02/2024
1139 reviews
Excellent product and excellent service. Delivery to us is tight and the driver was fantastic managing to get the pallets right to our garage door.
Gordon Housley from Frome on 07/02/2024
1139 reviews
Delivered on time and placed where I wanted S every firm should but all too often don't. Mushroom compost a little fresher than ideal but still good value.
Paul from Bishops Waltham on 07/02/2024
1139 reviews
Excellent compost well packed and delivered promptly. Last year I had the best crop ever after using it. Thanks.
Paul from Bishops Waltham on 07/02/2024
1139 reviews
Excellent compost well packaged and delivered promptly on a pallet. I bought the same last year and had the best crops ever. Thanks.
Shane Dolman from Walsall on 07/02/2024
1139 reviews
Excellent product, good price and super efficient delivery.
Lynne Evans from Crewe on 07/02/2024
1139 reviews
Marvellous soul improver, just right for a spring boost for the soil. Easy to spread and well rotted compost. Delivered in time to the correct location.
Susan Browne from Chesterfield on 06/02/2024
1139 reviews
Cannot fault this company -Brilliant service and great product
Tim from Stratford-upon-Avon on 03/02/2024
1139 reviews
Order acknowledged and delivered efficiently. Delivery driver located the bag in a good position. The manure itself is good, no powerful smell. Handled well and looks great now down.
S Amin from London on 31/01/2024
1139 reviews
Great service. I received my order on time and was c happy with the delivery and compost.
Linda Emsley from Sheffield on 28/01/2024
1139 reviews
Brilliant, delivery good and the compost has done wonders for my garden.
Matt from Queniborough on 28/01/2024
1139 reviews
Compost was as expected and no doubt will help acheive the growing conditions. The product was really well wrapped with every bag fully sealed. No rips or spillages. Big shout out to the haulier too. Despite roadworks appearing outside my house on delivery day, the driver parked up down the road and walked the pallet truck to my door. Great service all round.
Rosemary Muirhead from Uttoxeter on 24/01/2024
1139 reviews
Good stuff excellent delivery Thank-you
Anne Hardy from Hereford on 20/01/2024
1139 reviews
This is my 3rd order of this compost and it’s every bit as good as the first two were. Perfect to add to the Herefordshire clay. Would definitely recommend buying from this company…..kept informed of my order throughout as well. Thank you from me and my soil!!
Sue Slade from Rustington on 17/01/2024
1139 reviews
Really pleased with the mushroom compost. Arrived on day it was supposed to. No visible chalk lumps in it. Looks like just horse manure but is spent mushroom compost.
Brenda from Leicestershire on 17/01/2024
1139 reviews
Always a pleasure to deal with this company from ordering, the quality of the product, helpful delivery driver and finally the cost which was surprisingly the same as last year…wonderful service I highly recommend we ordered 2 pallets of mushroom compost which is easier to distribute bag by bag on our garden.
Richard from Stourbridge on 23/12/2023
1139 reviews
Excellent product and delivery as usual
Tom from Leeds on 16/12/2023
1139 reviews
Will use CPA again for ordering compost. Arrived on chosen day. Got a message from delivery company with 2hr delivery window. The mushroom compost looks good, although not well rotten. Best purchased in autumn or winter to leave on beds for a few months before planting m
Isabel Hull from CHELTENHAM on 13/12/2023
1139 reviews
The mushroom compost looks good, nice big bag delivered on time by a very helpful driver.
David Inwood from Cranfield on 10/12/2023
1139 reviews
Very good service and product, also delivered on time.
Evelyn and Dave Inwood from Cranfield on 10/12/2023
1139 reviews
Very good service and product
Maeve from London on 09/12/2023
1139 reviews
Ordered 90 bags to be delivered to the allotment, good quality and nice and warm, handy for the winter! Delivery good and driver rang me 30 mins before arriving which was helpful!
Robert Berry from Weston-Super-Mare on 07/12/2023
1139 reviews
Excellent service as always. The website is very easy to use, making ordering simple. Delivery was prompt, and the product was extremely well packaged with not one bag torn. The prices are really good, especially when compared to a lot of other sites. I will definitely be using again, and would recommend this company to anyone.
S Khan from Slough on 03/12/2023
1139 reviews
This is the first time I have ordered from CPA, delivery was on time. I opened up and put the compost out in my garden. Smells good, will have to see what the results will be, but at this stage I'm happy with the service and product.
Mike from Maidenhead on 30/11/2023
1139 reviews
Great product. Delivery to suit and good price. Will definitely use again
Kevin, Mark Bagg from Cambs on 28/11/2023
1139 reviews
As a former mushroom grower for over 25 years I know what proper mushroom compost should be like and I can say without a doubt this is the real deal and was exactly what it said in the advert. Good quality compost and is what my garden needed and was delivered on time with all the bags in tact.
Alan from Chesterfield on 27/11/2023
1139 reviews
Mushroom compost arrived all fine.
Jane from Northumberland on 20/11/2023
1139 reviews
A good product very easy to use from the bags. Great system for giving precise instructions about where to deliver. Only problem was the delivery driver didn't have the instructions.
Karl Godfrey from SANDWICH on 20/11/2023
1139 reviews
Very good quick delivery and on time
Helen Drury from Nesscliffe on 17/11/2023
1139 reviews
Returning customer, always delighted with product. Good quality and no debris. Easy to order and arrange delivery date. Customer service team helpful and provided me with estimated delivery time. Delivery service excellent, driver went above and beyond to place pallet in quite an awkward position for me.
Colin Mayne from Brigg on 13/11/2023
1139 reviews
Mushroom compost perfect for mulching , mix it with my own garden compost, well impressed with the results. Delivery was well communicated, on time, would recommend CPA without hesitation.
Clive Kelly from Gateshead on 11/11/2023
1139 reviews
Excellent quality compost and really helpful delivery driver.
Clive Kelly from Gateshead on 11/11/2023
1139 reviews
Excellent compost with exactly the quality I had hoped for. The delivery driver was really helpful too.
Ben Jones from Argyll on 07/11/2023
1139 reviews
We live on a remote island and CPA is without the best supplier I've come across for delivery. Absolutely top notch The mushroom compost was as expected, a little on the course side but we ran it through a cement mixer to get a finer texture. Looks nice and rich so we will see how well it works
Karen from Norfolk on 30/10/2023
1139 reviews
Excellent product, efficient and helpful delivery drivers and good updates on delivery
Ross from Southport on 22/10/2023
1139 reviews
Excellent service, excellent product and delivered bang on time.
Ross from Southport on 22/10/2023
1139 reviews
Excellent product delivered bang on time, easy ordering.
james coggins from horsham on 20/10/2023
1139 reviews
Delivery was quick and on time, quality of the product was excellent and we will certainly order more very soon.
kate from bristol on 17/10/2023
1139 reviews
1st order with CPA and will order again. Arrived on time. Order left where requested and great quality manure!
Yemmi from Bridgnorth, Shropshire on 16/10/2023
1139 reviews
Ordering process was straightforward and the compost was delivered promptly as advised. The driver was helpful and respectful of my property which I appreciate.
Yemmi Agbebi from Bridgnorth, Shropshire on 16/10/2023
1139 reviews
Ordering was smooth and the compost was delivered as planned. The driver was helpful and he placed the pallet where I wanted it near the gate into my back garden. He was also very respectful of my property which I appreciate. Excellent company. Will recommend.
Penelope Tillier from Horsham on 13/10/2023
1139 reviews
The whole process was extremely quick and efficient. The product exactly as I had hoped it would be. Thank you. Would definitely use this company again
Penelope Tillier from Horsham on 13/10/2023
1139 reviews
I am extremely happy with the service provided. My compost arrived safely and without problem.. I have used only a bag at present as I was waiting for the rain, but from what I can see the product is exactly what I expected.
Debs from Shropshire on 12/10/2023
1139 reviews
Excellent service, CPA were very helpful and efficient. It was great to speak directly to a person to ask for advice. The delivery driver kept us update with time of delivery and place the bulk bag exactly where we asked. Great mushroom compost. Already recommended CPA to others.
Softscape Gardens from Cambridge on 10/10/2023
1139 reviews
I have been using this product since years ago and I still find it one of the best soil improvers available.
Ian Camm from Berkeley on 09/10/2023
1139 reviews
Efficient ordering and delivery- great looking product now spread on my veg garden.
Ian Camm from Berkeley on 09/10/2023
1139 reviews
Efficient delivery- great looking product now spread on my veg garden.
Paul Davies from Barnsley on 07/10/2023
1139 reviews
Goods arrived exactly on time with good communication. Very impressed with driver who was very helpful in getting the pallet into the right spot. Not used the product yet but I am very happy with the service provided.
Tina Kirkbride from Penrith on 02/10/2023
1139 reviews
Always buy our Mushroom Compost from CPA, excellent quality and very organised delivery.
Henry Hochfelder from Pinner on 29/09/2023
1139 reviews
Excellent product - clearly fresh - and excellent customer service from CPA Horticulture from start to finish. Professional, efficient, helpful and friendly.
David George from Swanage on 27/09/2023
1139 reviews
Delivered as stated. Looks good quality.
Charlotte from Swanage on 25/09/2023
1139 reviews
Great compost, delivered quickly and with no fuss.
David Gude from Chesterfield on 22/09/2023
1139 reviews
Excellent spent mushroom compost - delivered as expected. It will certainly help on the allotment !
Dave Gude from Chesterfield on 22/09/2023
1139 reviews
Excellent spent mushroom compost - delivered professionally- and good communication from CPA Horticulture
Richard Stirland from Leeds on 12/09/2023
1139 reviews
Good product at a good price
Winston Collinge from Lancaster on 11/09/2023
1139 reviews
The compost came on a strong pallet and was packed in good quality bags which made handling this bulky product much easier. The delivery arrived on the expected date. The compost had obviously been heat treated to kill-off any remaining mushroom spores. I'm very happy with it, so I will order again.
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