The best potting soils, compared.
Top pick: Munnie multi-purpose compost 60 L Best value: Munnie multi-purpose compost 60 L – Lowest 60 litre title price at about £9.34, with 4.6 from 2,045 reviews. Pack count 2, so check the litres. Not peat-free. Updated October 2026.
Potting soil in the UK is bagged potting compost: a growing medium for containers, not garden soil dug from a border and not homemade heap compost. On amazon.co.uk you usually buy a 50–120 litre multi-purpose sack for patio pots, or a smaller 8–10 litre houseplant mix. Titles mix potting soil, compost and multi-purpose on the same product. A suitable bag is fresh and crumbly, and the label names the job. If peat matters to you, only the words peat-free count. Organic and eco-friendly do not prove the bag is peat-free. England announced a retail peat ban for 2024. By 2026 no statute was in force, so peat bags can still be sold. Starter feed on a typical bag lasts about three to four weeks unless the label claims longer. Water peat-free mixes by finger or pot weight, not by a dry-looking surface. How to match the bag to the job is set out in the [potting soil buying guide](/hub/fertiliser-soil-and-bark-mulch/potting-soil/sub/potting-soil-buying-guide).
Potting soil in the UK is bagged potting compost: a growing medium for containers, not garden soil dug from a border and not homemade heap compost.
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Personal buying guide
Question 1 of 2
Where will you use it?
Munnie’s listing is titled 60 litres at about £9.34, with 4.6 from 2,045 reviews and a listed weight of 14.9 kg. That is the cheapest patio-scale face in this set if the bag that arrives is really 60 litres. A bullet claims vermiculite, wetting agents and a reduction in peat use, plus organic materials and an eco-friendly bag, with no certifier named. The same listing sets the pack count to 2, so price per litre is not calculated and you should count what lands on the doorstep. Reviewers use it for indoor and outdoor plants, vegetables and potting, which matches the wide job list. It is the best value here on title price and stars, not a proven two-bag deal and not a peat-free mix. Skip it if you needed the words peat-free, or a pack field that already agrees with the litres.
Pros
Cons
Best for: A cheap multi-purpose fill when you will check the parcel litres before you count pots.
Less suitable: Anyone who needs peat-free in print, or a listing whose pack count and litres already agree.
Specifications
Common questions
Is this listing peat-free?
No. A bullet says the mix enables a reduction in the use of peat. It does not say peat-free. Organic and eco-friendly wording has no certifier number.
How many bags do you get?
The title and the volume field say 60 litres. The listing also sets the pack count to 2. Price per litre is not calculated because of that clash.
What does the listing say it is for?
Indoor and outdoor plants, vegetables, fruit, flowers, herbs, shrubs, trees, germination and potting. Vermiculite and wetting agents are claimed.
Houseplant Focus is a twin pack of two 8 litre peat-free bags from Growth Technology at about £17.98, about £1.12 a litre, with 4.6 from 1,739 reviews. The title and the bullets print peat-free, which is the only dedicated indoor mix in this set that does so. A bullet tells you to repot every 18–24 months, loosen the root ball, pot on and water well. The listed weight is 1.2 kg for 16 litres, and the unit-count field says 2.0 gram, which does not match the litres, so treat the weight as a listing clash. Reviewers buy it as a houseplant repotting mix. Some add perlite or orchid bark for tropical plants, which the listing does not include. It is the indoor peat-free pick here, not a 60 litre patio sack and not a cheap pence-per-litre bag.
Pros
Cons
Best for: Indoor houseplants when you want peat-free in print and will store two 8 litre bags.
Less suitable: Patio volume on pence per litre, or a single cheap 10 litre bag.
Specifications
Common questions
Is this mix peat-free?
Yes. The title and the bullets print peat-free. It is sold as a houseplant repotting mix.
How much compost is in the pack?
The title is a pack of two 8 litre bags. The volume field is 16 litres. The unit-count field says 2.0 gram, which does not match the litres.
How often does the listing say to repot?
A bullet says to repot houseplants every 18–24 months, loosen the root ball, pot on and water well.
The Growmoor 60 litre multi-purpose sack is a patio-scale compost at about £13.98 on amazon.co.uk, about 23.3p a litre, listed at 14 kg, with a United Kingdom origin line and a 4.5 rating from 7,425 reviews. The bullets name seeds, cuttings, pots, hanging baskets, beds and borders, so the listing treats one mix as a general container fill rather than a houseplant recipe. Reviewers on that large sample keep using it for patio pots and baskets, and the gardening-soils rank (12) matches a high-volume doorstep bag. The listing does not print peat-free, so assume peat may be present unless those words appear. It is a single 60 litre sack, not the twin listing that shares the brand name. It is the top pick for a 60 litre patio job whose litres and weight agree and whose review file is the largest here, not a 10 litre indoor mix and not a printed peat-free bag.
Pros
Cons
Best for: Patio pots, hanging baskets and a 60 litre fill when you want the deepest amazon.co.uk review file in this set.
Less suitable: Anyone who needs peat-free in print, or a single indoor plant that only needs a 10 litre bag.
Specifications
Common questions
Does the listing say this 60 litre bag is peat-free?
No. The bullets describe nutrients, an open texture and water retention. They do not say peat-free.
What jobs does the listing name?
The bullets name seeds, cuttings and containers, and also beds, borders, pots and hanging baskets. Indoor plants and vegetables are questions on the listing. The listing does not answer them.
What is the price and the review line?
The amazon.co.uk listing is about £13.98, with 4.5 from 7,425 reviews. The listed weight is 14 kg.
The CB Fuels listing is titled two 60 litre Growmoor bags at about £21.71, listed at 22 kg, with 4.4 from 3,611 reviews. The volume field says 60 litres against that twin title, so price per litre is not calculated. Some reviewers received Growmoor bags as titled. At least one received Bayview Blossom & Bloom bags with no litre mark on this listing. The bullets name flowering plants, potted plants, flower beds and added nutrients, with no peat-free line. The Consumer Rights Act 2015 is the frame if the brand on the bag is not the brand on the title. Skip this listing if you need the titled Growmoor bags every time. Use the single 60 litre Growmoor sack instead.
Pros
Cons
Best for: A large outdoor fill when you will check the brand on the bags before you empty them.
Less suitable: Anyone who needs two Growmoor bags as titled, every order, with no substitute risk.
Specifications
Common questions
How many litres does the listing agree on?
It does not. The title is 2 x 60 L. The volume field is 60 litres. Price per litre is not calculated.
Is the compost named as peat-free?
No. The bullets cover flowering plants, potted plants, flower beds, multi-purpose compost and added nutrients.
What do reviews say about the bags that arrive?
Some reviewers received Growmoor bags as titled. At least one received Bayview Blossom & Bloom bags with no litre mark on this listing.
DIVCHI’s 10 litre potting soil is about £7.70, about 77p a litre, with 4.4 from 1,702 reviews. The listed weight is 680 g, and the first 50 reviews describe a compressed block that expands after you add water. The title and the bullets use organic and eco-friendly wording with no certifier and no peat-free line. One bullet names vermiculite. Another says 20% sand and perlite, and another 50% garden soil, so the recipe on the page does not read as one clean indoor mix. The stated uses run from indoor plants to vegetables, trees and germination. It is the cheapest small-format face if you wanted a brick that stores flat, not a loose 10 litre bag ready to pot. Skip it if you expected a crumbly sack on arrival.
Pros
Cons
Best for: A flat or shed with no room for a 60 litre sack, if you will expand the block with water first.
Less suitable: Anyone who wanted a ready loose 10 litre bag, or peat-free in print.
Specifications
Common questions
Is this a loose 10 litre bag?
The title and the volume field say 10 litres. The listed weight is 680 g, and the first 50 reviews describe a compressed block that expands after you add water.
Does the listing say it is organic or peat-free?
The title and the bullets use organic and eco-friendly wording. There is no certifier number and no peat-free line.
What additives does the listing name?
Vermiculite for moisture hold. One bullet says 20% sand and perlite. Another bullet says 50% garden soil.
The Miracle-Gro houseplant potting mix is a 10 litre indoor bag at about £8.99, about 89.9p a litre, listed at 3.34 kg, with 4.3 from 4,661 reviews. A bullet claims a feed for up to three months, which is longer than the four-week default on most bags. The uses named are seedlings, cuttings, herbs, houseplants and patio pots. The listing does not print peat-free or an NPK, and organic is an unanswered question on the page. The review theme that comes up most often after indoor repotting is fungus gnats, plus a smell and a less refined texture for some buyers. It is the high-sample indoor bag in this set, not a cactus or orchid mix and not a printed peat-free houseplant compost. Use it when you want a small dedicated indoor bag and will watch watering. Skip it if gnats after a new bag are a red line.
Pros
Cons
Best for: One or two houseplants when you want a small indoor bag and a three-month feed claim.
Less suitable: Anyone who treats gnats as a deal-breaker, or who needs peat-free in print.
Specifications
Common questions
How long does the listing say the feed lasts?
A bullet says it feeds for up to 3 months. The listing does not print an NPK.
Does the listing say peat-free or organic?
No. Organic is a question on the listing and is not answered there. There is no peat-free line.
What do the reviews mention most often as a problem?
Fungus gnats after indoor repotting. Some reviews also mention smell and a less refined texture.
Laeto’s listing is titled 120 litres of multi-purpose compost at about £24.99, about 20.8p a litre, with 4.3 from 1,857 reviews. The body calls it an organic planting mix of topsoil and soil improver for houseplants, vegetables, seedlings, pots, beds and lawn top dressing, with no certifier and no peat-free line. One review calls the compost peat-free. That is a review, not the label. At least one review describes 40 litre bags on this listing, so count what arrives. Reviewers who used it outdoors report a usable mix. The farmyard smell is the reason several would not use it indoors. It is a volume patio or allotment fill, not a houseplant bag and not a printed peat-free product.
Pros
Cons
Best for: Outdoor pots and a large fill when smell does not matter and you will count the bags.
Less suitable: Houseplants in a flat, or anyone who needs peat-free in print.
Specifications
Common questions
Does the listing say peat-free?
No. The listing body does not print peat-free. One review calls the compost peat-free. That is a review, not the label. Organic planting-mix wording has no certifier number.
What volume does the listing state?
The title and the volume field say 120 litres. At least one review describes 40 litre bags on this listing.
What jobs does the listing name?
Indoor houseplants, vegetables, herbs, flowers, seed sowing, bulbs, rose beds, citrus and lawn top dressing. It claims a loam-based mix of topsoil and soil improver.
The PLANT!T block is compressed coir that the listing says expands to 15 litres after you add 6–8 litres of water, at about £9.86, about 65.7p a litre, listed at 1.12 kg, with 4.3 from 508 reviews. The listing says peat-free and natural with nothing added, so it is a substrate rather than a fed potting compost. Reviewers who expected a three-month feed then add compost or liquid feed, which matches that nothing-added line. The country-of-origin field says España, and the soils rank (601) is far weaker than the patio sacks. It is the peat-free brick in this set if you will expand it and feed it yourself, not a complete houseplant mix in a ready bag.
Pros
Cons
Best for: Seedlings or houseplants when you want a peat-free coir substrate and will add your own feed.
Less suitable: Anyone who expected a fed multi-purpose sack, or a printed indoor mix with a three-month feed.
Specifications
Common questions
Is this a complete potting compost?
The listing says peat-free and natural with nothing added. It is a compressed coir block. The listing tells you to add 6–8 litres of water. Reviewers who expected a fed compost then add compost or feed.
Does it contain peat?
The listing says peat-free. That question is also asked on the listing page.
How much mix do you get?
The listing says the block expands to 15 litres. The listed weight is 1.12 kg.
The Miracle-Gro twin-pack listing is titled 2 x 10 L at about £12.30, about 61.5p a litre if 20 litres arrive, with 4.2 from 274 reviews. The volume field says 10 litres while the unit count is 20,000 ml, so treat the pack as a clash rather than a measured 20 litres. The only bullet is about root growth. There is no peat-free line and no indoor-use answer. Reviews mention sticks and twigs, a bag with blue plastic strips, and fungus gnats after indoor repotting. The sample is the thinnest Miracle-Gro file here. It is a twin indoor-scale pack only if you will check both bags, not the 10 litre houseplant mix with 4,661 reviews.
Pros
Cons
Best for: Two small bags in one order when you will open them and accept a thin review file.
Less suitable: Anyone who wanted the 4,661-review 10 litre houseplant listing, or a clean litre field.
Specifications
Common questions
How many litres is the pack?
The title and the pack count are 2 x 10 L, and the unit count is 20,000 ml. The volume field says 10 litres. Treat that as a clash, not a measured 20 litres.
Does the listing say peat-free?
No. The only bullet is about root growth.
What problems appear in the reviews?
Sticks and twigs, a bag with blue plastic strips, and fungus gnats after indoor repotting.
Nine amazon.co.uk listings were scored from the stored pages and the UK review notes already on file. Shelf date 21 October 2026. There is no growth trial and no fill-volume measurement. A peat-free line, an organic line or a feed length is only what the listing prints. Where the title and the pack count disagree, both stay and the clash is a deduction. The top pick is the 60 litre patio sack whose litres and listed weight agree and whose review file is the largest. The best value is the lowest 60 litre title price. It is not the top pick. The weights below sum to 100.
Listing clarity
35%A named job, litres that agree with the pack count, and a peat line only when the listing prints peat-free. Organic or eco wording with no certifier does not count as peat-free. Growmoor 60 L agrees at 60 litres and 14 kg and does not print peat-free. Houseplant Focus prints peat-free, then lists 1.2 kg against 16 litres. Munnie, the Growmoor twin pack and the Miracle-Gro twin pack each carry a litre clash.
Amazon evidence
30%Star rating on amazon.co.uk, then the size of that listing's review file. Growmoor 60 L is 4.5 from 7,425, the largest file. Miracle-Gro houseplant mix is 4.3 from 4,661. Munnie is 4.6 from 2,045. The Miracle-Gro 2 x 10 L listing is 4.2 from 274, the thinnest file here.
Review outcome
20%Comments that describe the bag that arrived, the texture and indoor use. Fungus gnats after repotting, a farmyard smell, sticks, plastic, and a substitute brand are deductions. A review that calls a bag peat-free is not the label. One substitute-bag report is a listing risk, not a measured fill.
Value
15%Shelf price in GBP against litres you can believe. Price per litre is not scored when the title and the pack count disagree. Where the litres agree, Growmoor 60 L is about 23.3p a litre and Laeto's 120 L title is about 20.8p. Houseplant Focus is about £1.12 a litre. Munnie's about £9.34 is the lowest 60 litre title price, and that is the best-value case.
Buy the job before you buy the star line. A patio sack, a houseplant bag and a coir brick are not one list. Prices below are amazon.co.uk shelf prices on 21 October 2026. This is not a growth trial.
Potting soil on amazon.co.uk is bagged potting compost for containers. It is not soil dug from a border, and it is not homemade heap compost. Shoppers usually want either a 50–120 litre multi-purpose sack for patio pots or a smaller 8–10 litre houseplant mix. Titles use potting soil, compost and multi-purpose for the same kind of bag. Match the job on the label before you match the price. A multi-purpose sack suits tubs, baskets and sometimes beds.
Organic and eco-friendly are wording. They are not a certifier and they are not peat-free. If the bag does not say peat-free, assume peat may be present.
A 60 litre title with a pack count of 2, or a twin title whose volume field is half, is a clash. Count the bags that arrive. A review of a different brand is a listing risk.
A peat-free mix can look dry on top while the pot is still heavy. Water by finger or by pot weight. A coir brick with nothing added still needs feed.
The bag has to match the job. Multi-purpose compost is the patio default for pots and baskets, and it is often too coarse for fine seed. A houseplant mix is an 8–10 litre indoor bag. It is not a cactus or orchid mix unless the listing says so. A compressed coir brick is a substrate you expand with water. A loam or John Innes style mix is the heavier long-term container option, and it still has to say peat-free if that is what you need. Only the printed words peat-free count.
Stated litres only help if the pack count agrees. Price per litre is left blank where it does not. A fresh bag, in Which?'s terms, is dry, unfaded and unused within about three months. Starter feed usually lasts about three to four weeks unless the label claims longer. One houseplant listing here claims up to three months. A coir block that says nothing added does not include that feed. A 60 litre sack in this set is listed around 14 kg.
Three typical situations, each with a recommendation from this comparison.
You want a 60 litre sack delivered and you will feed after about a month. Growmoor multi-purpose compost 60 L is the top pick at about £13.98, with 4.5 from 7,425 reviews. The litres and the 14 kg weight agree. The listing does not print peat-free.
You need a small indoor mix and you want peat-free in print. Houseplant Focus, two 8 litre bags, is about £17.98, with 4.6 from 1,739 reviews. The title prints peat-free. The listed weight of 1.2 kg does not match 16 litres. The Miracle-Gro 10 litre bag is the larger indoor review file, and those reviews mention fungus gnats.
You can store a brick, not a 60 litre sack, and you will add water and feed. PLANT!T compressed coir is about £9.86 and the listing says it expands to 15 litres, peat-free, with nothing added. It is 4.3 from 508 reviews. DIVCHI at about £7.70 is the cheaper 10 litre title, and the reviews describe a compressed block with no peat-free line.
The top pick for patio pots is Growmoor multi-purpose compost 60 L at about £13.98. The listing is one sack at 14 kg, amazon.co.uk shows 4.5 from 7,425 reviews, and the bullets name pots, baskets, seeds and cuttings. It does not print peat-free. The best value is Munnie multi-purpose compost at about £9.34, 4.6 from 2,045 reviews, the lowest 60 litre title price. The pack count is 2, so the litres are a clash, and a peat reduction is not peat-free. Houseplant Focus is the indoor bag that prints peat-free. None of these scores is a growth trial or a measured fill.
Munnie multi-purpose compost 60 L
Lowest 60 litre title price at about £9.34, with 4.6 from 2,045 reviews. Pack count 2, so check the litres. Not peat-free.
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 sources from the research digest, used for this page in October 2026. Prices, stars and review counts are from the nine amazon.co.uk listings captured on 21 October 2026. Peat-free means the listing prints those words. Organic wording is not a certificate. This page did not measure fill volume or run a growth trial.
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 growth trial.
