• 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
1270 reviews (4.9/5)  1270 Reviews  
Andrew Jennings from Bristol on 13/03/2025
1270 reviews
Great product and service as always.
Clare Seymour from Croydon on 13/03/2025
1270 reviews
I have ordered Mushroom Compost from CPA for several years. It is well rotted on arrival and gives me excellent veg. crops. This year the flower beds are all getting a mulch with it too. Very good value. A top product.
Mark Brandon from Salisbury on 12/03/2025
1270 reviews
Delivery driver very helpful and compost as good as we have come to expect.
Claire Gaze from Truro on 11/03/2025
1270 reviews
Really great service, easy to order, swift arrival packaged securely on a pallet with excellent communication throughout, delivered on a day of my choice. Looking forward to mulching and improving my soil!
Mark from Northumberland on 11/03/2025
1270 reviews
Order processed promptly and CPA were very helpful in arranging preferred delivery day. Final courier in the chain was spot on and kerbside drop exactly where I wanted it. Driver flagged that bottom couple of bags were split and took photos, by the time I moved the load decided that probably hadn't been enough lost to raise issue. As for the product looks, smells and handles as expected only time will tell on performance but have already recommended to others.
Richard from Stevenage on 10/03/2025
1270 reviews
Good quality compost. Easy ordering, efficient on time delivery.
Richard from Stevenage on 10/03/2025
1270 reviews
Good quality compost, easy to use. Easy ordering process and fast efficient delivery, on time.
Elaine from Malpas on 09/03/2025
1270 reviews
I've bought mushroom compost from CPA for several years, quality of compost is excellent, no rubbish in it, just good dark rich compost, price has not gone up , ordering is easy on line, great communication from order to delivery, can't recommend CPA highly enough, Rating is better than good, it's excellent !
Michele Allen from Lancaster on 07/03/2025
1270 reviews
Excellent compost. Used it last year on garden of new our build house with great results last summer: Newly planted flowers, shrubs and trees all did well. Bought another 20 sacks this spring. These are easy to move ariound.
Rorie from Dunmow on 06/03/2025
1270 reviews
Great product and because we ordered the bags easy to transport around the garden to the areas it was needed. Will definitely order again.
Teresa Jane Andrews from Warwickshire on 04/03/2025
1270 reviews
Such wonderful service and great product, I would defiantly recommend and will be ordering from CPA again.
Mark Brandon from Salisbury on 02/03/2025
1270 reviews
Delivered on time to an awkward site. Mushroom compost good as always.
Sarah from LLandeilo on 01/03/2025
1270 reviews
Delivered on specified day, nice mushroom compost. Delivery man went out his way to get to us as a tree had come down , and he had to make quite a detour.
nige from Essex on 01/03/2025
1270 reviews
Excellent all round - yearly delivery arrived on time and the compost is excellent - comes highly recommended by us ..
Marcel Florax from Bircham Tofts on 01/03/2025
1270 reviews
The communication about my order was excellent and the delivery driver similar. He went out of his was to get the pallet in the right position on the driveway. The compost is excellent and I will definitely buy more in the future.
Linda from Bristol on 27/02/2025
1270 reviews
Excellent mushroom compost -we will be back for more. Our delivery driver Simon went above and beyond to help
H Baker from Warminster on 27/02/2025
1270 reviews
Delighted, efficient delivery, great product. Easy to break up and scatter or deep mulch. No smell, ideal for the job
Holly from Warminster on 27/02/2025
1270 reviews
Very efficient pallet delivery. The mushroom compost is superb. Breaks up with trowel or hand, easy to spread on garden. No smell, just perfect. My neighbours have now ordered a pallet, 20 x 75 easy to manage and store.
Dave B from Newtown on 26/02/2025
1270 reviews
Excellent once again! We buy the mushroom compost every Spring and it's a fantastic mulcher. Delivery is fast and inexpensive too. Perfect!!
Matthew Doano from Keswick on 25/02/2025
1270 reviews
Good compost, easy to spread and contained hardly any foreign material. Driver was excellent in calling us before he arrived and delivering product into garage.
Sue from Nottingham on 24/02/2025
1270 reviews
Super service as always, excellent product and friendly customer service
Dianne from Winslow on 23/02/2025
1270 reviews
Great service from CPA from order to delivery. Compost looks fabulous , ideal for the allotment.
Mairi from Wester Ross on 21/02/2025
1270 reviews
Good product. Problems with delivery to my area but this is down to the courier and my rural location rather than CPA. Staff very helpful.
Craig booton from West kirby on 20/02/2025
1270 reviews
Great product and delivery
David Langan from Bristol on 18/02/2025
1270 reviews
Very pleased with the compost and timely delivery 249ebc
TonyO from Monmouth on 18/02/2025
1270 reviews
The first time we have used CPA Horticulture and will definitly use them again. Order process was simple, with good communications. The Delivery arrived well packed on a single use pallet with polite friendly driver who placed the pallet exactly where we wanted it. The important bit... the Mushroom Compost was excellent and is now spread on the flower beds.
Philip Squire from DORKING on 17/02/2025
1270 reviews
great service and great product
Paul from Cheltenham on 16/02/2025
1270 reviews
CPA Horticulture Mushroom Compost. Bought this a cheaper alternative to Horse Manure Mulch for the purpose of bulking up a few beds. Its wet, it's clumpy, and its a bit more inconvenient to handle, the bags are large & heavy. Not my preferred mulch. Ideally I would leave this to rot down for 6 months before use. I spread a bag and its hard work, unlike the Horse Manure Mulch. Delivery was ok, very late in the day and the driver said I was lucky because he was not going to make his last 4 drops but he did mine as he was round the corner.
Julie from Wolverhampton on 15/02/2025
1270 reviews
Easy to place an order and good communication from CPA. Quick delivery and the delivery driver followed our instructions to the letter. The compost looks good. This is the 4th time we have used this company. No complaints, very satisfied.
john l from walton on the hill on 14/02/2025
1270 reviews
delivery man was great leaving the pallet at the end of the drive out of the way. compost was fantastically fresh .
john litster from walton on the hill on 14/02/2025
1270 reviews
Delivery guy was very good leaving the pallet at the top of the drive out of the way.Product was great
Elaine Wilson from BELFORD on 11/02/2025
1270 reviews
Compost not truly aged as yet but plenty of micro fungal presence. Strong strudel bags but 5/30 were damaged and compost leaking. Driver not helpful normally this is delivered into garden over a 1.5 inch max curb but thus time was tkd definitely not possible........hmmm
Sarah from Midlands on 11/02/2025
1270 reviews
Lovely compost, well mixed, no big sticks or debris, only down side was a little feline gift left in the top but that was quickly removed
Barker from Winchester on 08/02/2025
1270 reviews
Excellent purchase to improve the soil conditions
Barker from Winchester on 08/02/2025
1270 reviews
Excellent purchase to enhance the garden.
Elizabeth Wilkins from Malvern on 04/02/2025
1270 reviews
Good ordering system. Excellent delivery Pleased with the compost
Wilkins from Malvern on 04/02/2025
1270 reviews
Efficient ordering and delivery system Pleased with the compost
Sue from Builth Wells on 03/02/2025
1270 reviews
Excellent service and great communication Would highly recommend the product and the company
Sue from Builth Wells on 03/02/2025
1270 reviews
Excellent service , great communication and great product. Would highly recommend
Les Smith from Tring on 03/02/2025
1270 reviews
Excellent all round from ordering to deliver. Third year of buying mushroom compost and I'm looking forward to a good No Dig growling season.
Les Smith from Tring on 03/02/2025
1270 reviews
Good customer service, excellent delivery by helpful driver! This is my third load of mushroom compost really excellent stuff and although to early to comment on the benefits for this year's growth, if it's as good as previous years I'm in for a very good growing season. As a no dig grower this compost is ideal.
Matthew Stonehouse from Sanquhar on 02/02/2025
1270 reviews
Swift delivery, good quality as always. Repeat customer
Anne Hardy from Hereford, Herefordshire on 31/01/2025
1270 reviews
This is the 4th year I have used this mulch, and as before, am very happy with the quality! Excellent service and speedy delivery with good communication throughout. Won’t hesitate to be ordering again next Spring!
Peter from Chawton on 16/01/2025
1270 reviews
Excellent service, thank you, with very helpful driver.
Mark Brandon from Salisbury on 03/01/2025
1270 reviews
We could not do without our regular mulch of mushroom compost.
Phil Gibbs from Nr Buckingham on 29/12/2024
1270 reviews
Ordering very easy, delivery very good and kept well informed. Prod, Mushroom compost good. Over all 5 star service very satisfied costumer.
Graham John Millard from Amesbury on 17/12/2024
1270 reviews
Good as the last load. will be back for another load in the new year. Thank-You.
Frances from Silverdale on 16/12/2024
1270 reviews
Great service - easy ordering on line, delivery within a few days of ordering, helpful and efficient delivery and great mushroom compost!
Frances from Silverdale on 16/12/2024
1270 reviews
Very impressive service, easy ordering system, fast delivery within a few days of ordering, efficient helpful delivery, great mushroom compost!
Sarah Minty from Stamford on 14/12/2024
1270 reviews
Delivery was timely and efficient as always. Great product.
STUART THORN from London on 02/12/2024
1270 reviews
Delivery person was great. Communicative, helpful. Great order, thanks
Andrew Butt from Gloucester on 30/11/2024
1270 reviews
Third time i have used CPA as with previous consignments the compost is of very good quality and delivery excellent.
Nigel from Bury St Edmunds on 27/11/2024
1270 reviews
All arrived on time and the driver left the pallet as requested. The compost looks good but a little fresh so I've used it as a top dressing on my asparagus beds. Have also added 2 bags to my compost bin and given it a good stir to mix it in, for use later.
Martin from Norwich on 25/11/2024
1270 reviews
The quality of this compost has improved even further this year. No stray bricks (!), virtually all bags completely intact, and contents nicely rotted. Can recommend
Ian Page from Horley on 25/11/2024
1270 reviews
Great service and easy to order. Delivery great and well protected from the elements on a pallet making it easy to use as and when I want to. This is 2nd year and last year it was the perfect product, protecting plants over Winter and suppressing weeds and retaining moisture in the Summer.
Gavin from Hitchin on 20/11/2024
1270 reviews
Mushroom compost is an amazing substance that is excellent on the allotment, rather than weed seed infested farm yard “compost”. I purchased 40 bags of mushroom compost that was delivered to my house. We slowly moved these bags to the allotment and they have since been rotatvated in. I am expected good yields next year
Simon Heffer from MALDON on 19/11/2024
1270 reviews
Prompt delivery and high quality compost
Simon Heffer from MALDON on 19/11/2024
1270 reviews
Prompt delivery and high quality compost.
Carol from Clitheroe on 13/11/2024
1270 reviews
Fantastic delivery driver. Excellent packed bags of mushroom compost and pallet. Very good compost. Easy to apply. No smell.
B Holmes from Hitchin on 11/11/2024
1270 reviews
Very helpful service and great product, Thankyou
Bernadette from Hitchin on 11/11/2024
1270 reviews
Very helpful service and great product. Thankyou
Softscape Gardens Ltd from Cambridgeshire on 07/11/2024
1270 reviews
Smelling but good for the purpose :)
Linda from Bristol on 05/11/2024
1270 reviews
Mushroom Compost looks good quality and in transportable bags. Delivery was delayed by a day due to driver sickness but was updated by both CPA and carrier. So all good. Let’s see how it impacts growth next season.
Mike from Fordingbridge on 05/11/2024
1270 reviews
Arrived on a massive truck, even though I had specified a small one. This completely blocked our narrow lane causing delays for several local residents. One bag had been torn in transit.
John K from Rickmansworth on 02/11/2024
1270 reviews
Easy ordering delivery as promised, reasonable prices and the product is decent quality. Highly recommended. Annual order of a pallet of 40 x 75l mushroom compost.
John K from Rickmansworth on 02/11/2024
1270 reviews
My annual pallet of 40 x 75l mushroom compost. Easy ordering and delivery was as advised. Have used a few bags and the compost seems good quality. Highly recommended.
Bill from Buntingford on 31/10/2024
1270 reviews
Excellent quality and value, delivered on time and in a friendly manner
Cwmgelli from Abertawe on 31/10/2024
1270 reviews
Our second order with cpa, all went smoothly. Delivery driver (with Frenni) was v helpful. 3 or 4 split bags out of the 80 but a minor inconvenience in the scheme of things. Quality and consistency of the mushroom compost appears good
John from CHINNOR on 29/10/2024
1270 reviews
40 x Mushroom Compost, arrived on time.Driver brilliant
Charles Watson from Bristol on 27/10/2024
1270 reviews
Well pleased with the product, the delivery driver was excellent, pallet placed inside my gate.
Charles Watson from Bristol on 27/10/2024
1270 reviews
Well pleased with the product, the delivery service was excellent pallet placed just inside my gate where I wanted it. Three bags had holes melted in them one big enough to loose a small amount in transit.
Patricia H W from Petersfield on 27/10/2024
1270 reviews
Very helpful delivery driver and the 40 x 70 Litres of mushroom compost arrived safely. All good compost and this is the third or fourth time we have ordered this and been pleased each time. It is good quality and well rotted compost which is perfect for our allotment.
Watt from Bedford on 26/10/2024
1270 reviews
Excellent service, delivered exactly where I wanted it. Lovely cheerful chap.
Steven from Telford on 25/10/2024
1270 reviews
Excellent service and very good product. Have been using mushroom compost as a mulch for many years. Thank you CPA
Judy from Maidstone on 25/10/2024
1270 reviews
Good compost went a long way and delivered on time
Judy from Maidstone on 25/10/2024
1270 reviews
Really nice compost ,delivered when they said
Bill from Buntingford on 24/10/2024
1270 reviews
Delivery on time, friendly and efficient. Product appears great too (test will be next Soeing), fryable, not wet, sweet smelling. Highly recommended. Can’t help seeing more areas where it would be good too so will probably order more .
Kenvyn from Norwich on 24/10/2024
1270 reviews
Buying the compost in bags made handling the delivery very manageable, and it was also easy to dist4ibaround our garden. The compost was of good quality
Kenvyn from Norwich on 24/10/2024
1270 reviews
Buying mushroom compost in bags made it really easy to distribute around our garden prior to spreading. The compost itself was excellent quality
Jerry Osborn from Maidstone on 14/10/2024
1270 reviews
Mushroom compost delivery on the date requested so all good. Only just dug in and spread on the new plots so looking forward to good growing results next season.
Paul from Buckingham on 11/10/2024
1270 reviews
Great product - delivered on the day - careful off load courteous driver
Mr John Allen from Stroud on 06/10/2024
1270 reviews
Delivery was great and economical. To use in next few weeks Cheers
Margarita Harvey from Lincoln on 06/10/2024
1270 reviews
Prompt delivery of mushroom compost. Quality product. Will use again to improve our clay soil. customer care very courteous. couriers very helpful too.
C Fisher from Harrogate on 04/10/2024
1270 reviews
Arrived as instructed. Very helpful driver place the pallet where I needed it. Seems to be good compost.
Eric from MIdsomer Norton on 30/09/2024
1270 reviews
Good value. Delivery on promised day. Driver polite and helpful. Product well packaged. Good even product which spread over border easily. No reason why it shouldn't help the soil and encourage the worms.
Paul Davies from Barnsley on 29/09/2024
1270 reviews
First class service from this company. Excellent communication. Driver was more than helpful. Highly recommend.
Anita Chalmers from YARM on 22/09/2024
1270 reviews
Easy and efficient service to use. Hope to make a great improvement in my soil quality.
Andy Maidens from Doncaster on 21/09/2024
1270 reviews
A very easy transaction from ordering to delivery. 40 bags of quality mushroom compost for our allotment society shop. So long as its as good as it says on the tin, we'll be back for more. Thank you
Akira Klass from Torrington on 20/09/2024
1270 reviews
Quick delivery, efficient service and high quality product. Very satisfied
Hugh from High Peak on 16/09/2024
1270 reviews
Really good quality organic matter. Ordered 3 tons, 40x 75L bags, for my new garden. Will be ordering another 6 tons for the back garden next year. Would recommend.
Phil from Ruskington on 13/09/2024
1270 reviews
Another year using CPA horticulture, prompt service, delivery as expected, a pleasure to do business. The compost is good too,
Mark Brandon from Salisbury on 08/09/2024
1270 reviews
Compost good as usual except for a very large stone!
Mark Brandon from Salisbury on 08/09/2024
1270 reviews
Compost was good as usual except for a really large stone!
Becks from Northants on 01/09/2024
1270 reviews
Ordering process easy, communication good, Arrived on time, and well packaged. Mushroom compost quality looks good, can’t wait to grow my veggies in it next year. Thank you
Mark Brandon from Salisbury on 21/08/2024
1270 reviews
Mushroom compost is excellent but a lot of extraneous material (largely baler twine) this time.
Geoff Smith from Forres on 16/08/2024
1270 reviews
Very good quality product. Lovely well rotted stuff ready to dig straight in or use as a mulch. Delivered on time and very helpful driver. A bit expensive but you get what you pay for.
Sarah from on 14/08/2024
1270 reviews
Cracking stuff. I am buying more
Sarah from on 14/08/2024
1270 reviews
Everything grows really well in it. I am buying more, it’s cracking!
Peter from Exeter on 13/08/2024
1270 reviews
Great product and easy delivery without any fuss
DAVID GARNER from FAKENHAM on 09/08/2024
1270 reviews
Good product would order again
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