The best cow manures, compared.
Top pick: Gro-Sure farmyard manure 50 L – Highest score: 50 litre title, volume and unit count agree, listed weight 26 kg, 4.6 from 756 reviews, about £10.99. Best value: Not awarded – The lowest coherent price and the highest score are the same 50 litre bag. The two-pack costs more per bag than two singles, and the £32 title has no settled size. Updated October 2026.
Cow manure for a UK garden is dung, usually mixed with straw bedding, stacked or composted until it is dark and crumbly. On amazon.co.uk the sack you usually meet is labelled farmyard manure. It is a soil improver, not a measured NPK feed, and not a potting compost you fill a pot with on its own. You tell a suitable bag by a dark, even crumb, a modest earthy smell, and a litre figure that matches the unit count and the listed weight. The material should have been stored or composted, rather than spread fresh. Fresh manure can scorch roots. Six months is a common minimum for rot, and a year if the bedding was woody shavings. For crops you eat raw, leave a long gap after fresh solid manure. The checks before you pay are in the [cow manure buying guide](/hub/fertiliser-soil-and-bark-mulch/cow-manure/sub/cow-manure-buying-guide). A full sack is heavy, so plan how you will move it, and keep mulch off woody stems. Chicken manure, coir and digestate sold as farmyard manure are different products.
Cow manure for a UK garden is dung, usually mixed with straw bedding, stacked or composted until it is dark and crumbly. On amazon.co.uk the sack you usually meet is labelled farmyard manure.
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Personal buying guide
Question 1 of 2
How many bags are you ordering?
The Gro-Sure bag is listed at £10.99 for 50 litres, and the title, the volume field and the 50,000 millilitre unit count all say the same figure. Across 756 amazon.co.uk reviews it sits at 4.6. Buyers mention potatoes, courgettes and roses, and they also describe batches that smell earthy and batches that still smell strongly of cow dung, with twigs, undecomposed straw and split sacks. One review says the bag felt like 50 kg, while the spec table says 26 kg, so the listed weight is the planning figure and the 50 kg note is a delivery complaint. The page names Westland Horticulture Ltd and the United Kingdom as origin, and it does not name the animal, a composting temperature or an organic scheme. It is the top pick in this set because the litres agree and the review file is the only large one. A barrow, or two people, is the realistic way to move a listed 26 kg up steps.
Pros
Cons
Best for: You want one delivered 50 litre farmyard bag and you can move a listed 26 kg.
Less suitable: You need a named organic licence, a potting compost, or a bag you can carry up stairs on your own.
Specifications
Common questions
Does the listing name the animal?
No. The title says farmyard manure. The brand field is Gro-Sure and the manufacturer is Westlands Horticulture Ltd. Cattle, straw and a composting method are not in the spec table.
Is it certified organic?
No scheme name, such as Soil Association, appears in the bullets or the spec table.
Do the litre figures agree?
The title, the volume field and the unit count of 50,000 millilitres all say 50 litres. The listed weight is 26 kg. One review says the bag was 50 kg.
The Gro-Sure two-pack is listed at £28.49 with a title of 2 x 50 litres. The unit count is 100,000 millilitres, which is 100 litres, while a separate volume field says 50 litres and the item form says granules. It is 3.6 from 12 amazon.co.uk reviews, a sample too small to show whether these sacks match the single bag's 756-review file. Two singles at £10.99 come to £21.98, so this pack costs more per bag even if both 50 litre sacks arrive as titled. The animal is not named, the origin field is empty, and there is no organic scheme. It stays in the set as a second farmyard title with a litre clash, and the listed weight is missing.
Pros
Cons
Best for: You have chosen this two-pack on purpose and you will check both bags against the title when they arrive.
Less suitable: You want the lower price per bag, or a listing whose litre fields agree.
Specifications
Common questions
How many litres does the listing claim?
The title says 2 x 50 litres and the unit count is 100,000 millilitres, which is 100 litres. A separate volume field says 50 litres. Those figures are not reconciled on the listing.
Is the item form a bag or granules?
The title is bagged farmyard manure. The spec table says granules. The listing does not explain the difference.
Is a use-by date given?
No date is in the spec table.
The generic listing is priced at £32 and the title says cow dung manure and cow dung compost. The bullets describe a black compost blend for indoor pots and for outdoor vegetables, flowers and herbs, and they do not state a cow-dung share. The volume field says 40 litres, the item weight says 500 g and the unit count says 1,000 g, so the page is describing more than one size. There is no star rating and no review text on the listing. Origin is listed as India and the manufacturer field says Self. At £32 it is a title with a size clash, and it is the listing to skip until a seller states one weight and a dung content you can check.
Pros
Cons
Best for: You are checking why a cow-dung title was kept in the set and then set aside.
Less suitable: You want a 50 litre UK farmyard bag with a review file and one agreed size.
Specifications
Common questions
Is this confirmed cow manure?
The title says cow dung manure and cow dung compost. The bullets describe a black compost blend and do not repeat the animal. The cow dung share is not stated.
Do the size figures agree?
The volume field says 40 litres. The item weight says 500 g and the unit count says 1,000 g. Those figures conflict.
Does the listing say it is ready to use?
Yes. A bullet says the pre-mixed formula needs no extra amendments and suits indoor pots as well as outdoor vegetables, flowers and herbs. There are no reviews on the listing.
Three amazon.co.uk listings were scored from the stored pages and the UK review notes already on file. Shelf date 19 October 2026. There is no laboratory test. BBC Gardeners' World, the Royal Horticultural Society and the Food Standards Agency are context for what a bag is for. They are not a score for these sacks. Price per litre sits beside the score and is not inside it. The highest score is the top pick. No best value is awarded: the lowest coherent price and the highest score are the same listing, and one product can carry only one award. The weights below sum to 100.
Buyer evidence
45%A star line counts with its review count. Gro-Sure 50 L is 4.6 from 756 reviews, then loses points for split sacks, variable smell, straw and a review that says 50 kg against a listed 26 kg. The two-pack is 3.6 from 12 reviews. A listing with no star line scores 0 on this block. That gap is not a one-star result copied from another brand.
Listing coherence
40%Points for a farmyard or cattle identity the bullets repeat, for litres, unit count and weight that do not fight, for a manufacturer or origin you can look up, and for a soil-conditioner job. A cow-dung title whose bullets describe a compost blend and do not repeat the animal scores low on identity. A 40 litre field beside 500 g and 1,000 g scores nothing on size.
Handling
15%A stated single-bag weight scores, then loses points when a review disputes it. A missing weight scores less. Conflicting weights score 0. The 50 litre Gro-Sure bag lists 26 kg. The two-pack lists no weight. The other title states 500 g and 1,000 g.
Buy the material before you buy the star line. Farmyard manure, a cow-dung title and a compost blend are not one product. Prices are amazon.co.uk shelf prices on 19 October 2026. This is not a laboratory test.
Cow manure for a UK garden is dung, usually with straw bedding, stacked or composted until it is dark and crumbly. On amazon.co.uk the label you usually meet is farmyard manure. A retail bag is likely to be cow manure or a mix, composted hot enough to kill many weed seeds, without naming the herd. It is a soil improver, not a measured NPK feed and not a potting compost. Confirm it is manure before you pay. Keep bagged farmyard manure.
Chicken manure, coir, multi-purpose compost and digestate are different products. SylvaGrow Farmyard is anaerobic digestate plus green compost. It is not cow manure.
Fresh manure can scorch roots. For crops eaten raw, the Food Standards Agency sets a 12-month gap before harvest and at least six months before planting.
None of these listings names an organic scheme or PAS 100. A page that asks whether a bag is organic is not a certificate.
Keep bagged farmyard manure. A retail bag is likely to be cow manure or a mix, and it often does not name the herd. Reject chicken manure, coir, multi-purpose compost, oil-cake granules and ritual cow-dung cakes. SylvaGrow Farmyard is anaerobic digestate plus up to 20 percent green compost. The maker says it works like farmyard manure. It is not cow manure. Prefer material that has been stored or composted. Fresh manure can scorch roots.
The litre figure, the unit count and the weight should agree. Gro-Sure 50 L does: title, volume and 50,000 millilitres, with a listed 26 kg, at about £10.99. One review says 50 kg against that listed 26 kg. The two-pack is titled 2 x 50 litres and the unit count is 100 litres, while a volume field says 50 litres and the form field says granules. It is about £28.49, more per bag than two singles. The generic title states 40 litres, 500 g and 1,000 g at about £32.
Three typical situations, each with a recommendation from this comparison.
You care first about rot and the gap before you harvest food you eat raw. Gro-Sure farmyard manure 50 L is the only bag here whose litres agree, at about £10.99, with 4.6 from 756 reviews. The listing does not prove how long it was composted, and it does not name the animal. The Food Standards Agency intervals still apply.
You mainly meet the weight of the sack. Gro-Sure farmyard manure 50 L lists 26 kg. Reviewers call it heavy, and one review says 50 kg. Plan a barrow or two people on steps. It is about £10.99. It is a poor fit if you need to carry it upstairs on your own.
You want structure, and a fresh strawy bag will not finish that job this season. Gro-Sure farmyard manure 50 L is sold as a soil conditioner, and the litres agree. The generic title says ready to use, but 40 litres, 500 g and 1,000 g conflict, so it is not the bag for this job.
The top pick is Gro-Sure farmyard manure 50 L at about £10.99. The title, the volume field and the unit count agree at 50 litres, the listed weight is 26 kg, and amazon.co.uk shows 4.6 from 756 reviews. The animal is not named, and there is no organic or PAS 100 claim. No best value is awarded. That bag is also the lowest coherent price, about 22p per litre if it is full. The two-pack is about 28p per titled litre and costs more per bag than two singles. The listing at about £32 does not settle 40 litres against 500 g. None of these scores is a laboratory test.
Gro-Sure farmyard manure 50 L
Highest score: 50 litre title, volume and unit count agree, listed weight 26 kg, 4.6 from 756 reviews, about £10.99.
Not awarded
The lowest coherent price and the highest score are the same 50 litre bag. The two-pack costs more per bag than two singles, and the £32 title has no settled size.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public UK and maker sources from the research digest, used for this page in October 2026. Prices, stars and review counts are from the three amazon.co.uk listings captured on 19 October 2026. None of these bags is claimed here as pure cow manure, certified organic or PAS 100. The 6.0 kg nitrogen figure is a farm typical, not a 50 litre bag analysis.
Expert source (DIY & tools): Lee Burkhill (Garden Ninja) (external profile) – public expert commentary used as a research source, not as a contributor to our pages.
This page contains affiliate links to amazon.co.uk (tag pcuk26-21). If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are from the listings. This is not a laboratory test.
