The best garden lime, compared.
Top pick: Topline garden lime 4 kg and Epsom salts 1.5 kg – Highest score: 5.0 from one review scales to 100. There is no review text and no stated lime dose. Best value: Westland lime soil conditioner, 4 kg (pack of 2) – About £19.98 for a listed 8 kg, with a printed 35–70 g per square metre rate and 4.4 from 974 reviews. Updated October 2026.
Garden lime is finely ground limestone or chalk. The active ingredient is calcium carbonate. You spread it or dig it in to make acid soil less acid. You want a pack you can weigh, not a complete fertiliser. Match the material, the weight and the rate to a soil test. Ground limestone or chalk has a typical neutralising value of about 50–55. Dolomitic lime is only for soil already short of magnesium. Calcified seaweed is weaker, around 44. Hydrated lime is calcium hydroxide and irritates skin and eyes. Test at least three months after the last lime, fertiliser or organic matter. At pH 7.0 or above, liming is unnecessary. Do not lime rhododendron, camellia, heather or blueberry. The Royal Horticultural Society aims at about pH 6.5 in the top 20 cm, using roughly 0.4–1.8 kg per square metre. A lighter labelled handful is a different job. What to check before you pay is in the [garden lime buying guide](/hub/fertiliser-soil-and-bark-mulch/garden-lime/sub/garden-lime-buying-guide).
Garden lime is finely ground limestone or chalk. The active ingredient is calcium carbonate. You spread it or dig it in to make acid soil less acid. You want a pack you can weigh, not a complete fertiliser.
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Personal buying guide
Question 1 of 2
Where will you use it?
Topline lists 4 kg garden lime with 1.5 kg Epsom salts and a card at £18.95; the item weight of 5.5 kg matches the two bags. The lime bullets say the soil becomes less acidic so vegetable plants can take up nutrients, and they name tomatoes, broccoli, cauliflower, and cabbage. Epsom salts are described as high magnesium; they are not lime. There is no stated lime dose. A line about dissolving feed for foliage is not labelled as lime-only, so it is not a treatment for blossom end rot. The star line is 5.0 from one review with no text, which scales to a score of 100 and is not a UK trial. This is a bundle, not a single weighed limestone.
Pros
Cons
Best for: A buyer who already wanted garden lime and a separate Epsom pack in one parcel
Less suitable: Anyone treating a 5.0 from one rating as proof, or using the foliage line for blossom end rot
Specifications
Common questions
What is in the bundle?
4 kg garden lime soil conditioner, 1.5 kg Epsom salts, and a Topline card. Item weight is 5.5 kg, which matches 4 kg plus 1.5 kg. Unit count is 2.
Which crops are named?
Tomatoes, broccoli, cauliflower, cabbage, trees, shrubs, and flowers. The lime bullets name vegetable plants. Lawn is not stated
Is a lime dose given?
No stated dose. A line says the feed can be granular or dissolved and applied to foliage. That dissolve line is not labelled as lime-only. The star line is 5.0 from 1, with no review text.
The Westland 4 kg pack of two is listed at £19.98 on amazon.co.uk, with an item weight of 8 kg and a dig-in method. The stated dose is 35–70 g per square metre, or one to two handfuls, all year, and the bullets also ask you to monitor pH through the season. That is a labelled handful rate, not the RHS kilogram table that aims at about pH 6.5 in the top 20 cm. Across 974 reviews the star line is 4.4, the largest UK sample here, so the score of 88 is 4.4 multiplied by 20 rather than proof the granules raised a plot by a stated amount. The listing names calcium for plants and magnesium for leaves, and a question about ericaceous plants is left unanswered. A 4 kg box at about 1 kg per square metre on acid clay covers roughly 4 m², which makes this twin pack the only kept listing with enough branded garden lime for a small correction. It is the best value in this set for a weighed bed job, not because it holds the highest score.
Pros
Cons
Best for: A tested acid bed or border when you want branded granules you can weigh
Less suitable: Ericaceous beds, a 50 g sample job, or anyone treating 35–70 g per square metre as the RHS kilogram table
Specifications
Common questions
How much does the listing say to apply?
1-2 handfuls, stated as 35-70 g per square metre, all year. The application method is dig in. The bullets say to monitor pH through the season.
Does the listing say it is safe for ericaceous plants?
A listing question asks that. The bullets do not answer it.
What pack size is printed?
The title says 4 kg, pack of 2. The item weight is 8 kg. Unit count and number of packs are both 2.
Encap’s fast-acting lime is £35.06, with 400 sq ft coverage and lawn grass as the target species. The file lists both 1.13 kg item weight and 2.5 litres liquid volume, so the pack size is unclear. Bullets describe extremely fine lime plus a patented AST polymer. The star line is 4.4 from 131 reviews; the saved texts are marked United States, and there is no United Kingdom block. Square-foot coverage is not the RHS kilogram table. At about £31 per kilogram if you trust the 1.13 kg figure, this is an expensive lawn SKU, not a cheap UK garden lime.
Pros
Cons
Best for: A buyer who already wants this US lawn SKU and will read the carton units
Less suitable: A UK bed correction priced in kilograms per square metre
Specifications
Common questions
What coverage does the listing state?
400 sq ft. There is no grams-per-square-metre rate. Target species is lawn grass. The bullets also say garden application.
What is the pack size?
Item weight is 1.13 kg and liquid volume is 2.5 litres. Both are in the file, so the pack size is unclear. Item form in the specification block is not stated
Are the reviews from the United Kingdom?
No. The file has 37 reviews marked Reviewed in the United States, and no United Kingdom block. The star line is 4.4 from 131.
This 50 g calcium carbonate powder is £3.95 and is sold as fertiliser-grade chalk for gardening, mushroom cultivation, homebrewing, and animal nutrition. The star line is 4.4 from 9 reviews; the only saved UK review text says the powder is very good for chalk paint and does not mention soil, pH, or plants. There is no stated dose and no crop list. The manufacturer field is Betta Shrimp Shop. Fifty grams will not cover a bed at an RHS correction rate, and it is the wrong object if you came here for kilograms of garden lime. The score of 88 is the star line scaled up, not evidence that the jar raised a plot’s pH.
Pros
Cons
Best for: A tiny sample for homebrew, mushrooms, or a craft use the listing names
Less suitable: An allotment or border that needs kilograms toward pH 6.5
Specifications
Common questions
What uses does the listing name?
Gardening, agriculture, mushroom cultivation, homebrewing, and animal nutrition. There is no crop list.
How big is the pack?
The title and the unit count say 50 g. Number of packs is 1. Item weight is not stated There is no stated dose.
What does the saved review say?
The only UK review text says the powder is very good for chalk paint. It does not mention soil, pH, or plants. The star line is 4.4 from 9.
The title says Levington garden lime, 2 × 3.5 kg, at £21.20, but the brand field is Fixtures Business & Homewares and the manufacturer is Fixtures. The part number is LevLime7kg. The unit count is 3,500 g while the title implies 7 kg, and item weight is missing, so the pack size is not settled. There is no star line and no stated dose. The bullets say the granules improve soil fertility and do not answer a listing question about soil acidity. Country of origin is United Kingdom. Until the carton in your hand shows a brand, a weight, and a rate, this row is a title rather than a measured garden lime.
Pros
Cons
Best for: Only if you will check the carton brand and weight before you rely on the title
Less suitable: Anyone who needs a printed rate, a settled kilogram figure, or a large UK review sample
Specifications
Common questions
Which brand is on the listing?
The title says Levington. The brand field is Fixtures Business & Homewares. The manufacturer is Fixtures. The part number is LevLime7kg.
Do the pack figures agree?
The title says 2 x 3.5 kg. The number of items is 2. The unit count is 3,500 g. Item weight is not stated
Does the listing say it corrects soil acidity?
A listing question asks whether it helps soil acidity. The bullets do not answer it. They say it improves soil fertility.
The title pairs 4 kg of Westland garden lime with a 2.5 kg seaweed stimulant at £18.53, and the unit count is 6,500 g. Feature bullets describe Autoglym car glass polish and a spray-on tyre dressing, so they are not treated as lime features. The specification names non-ericaceous plants and vegetables. There is no stated dose and no star line. Model number 20600101 matches the twin 4 kg Westland conditioner, which does not prove this bundle is the same carton. Item weight is missing. You cannot recommend this ASIN from its bullets, and you cannot quote a pH change from a page that does not give a rate.
Pros
Cons
Best for: Only if the parcel you receive is clearly garden lime and a stimulant, and you will follow the pack in the box
Less suitable: Anyone who needs usable bullets, a printed rate, or a review sample
Specifications
Common questions
What does the title say is included?
Garden lime, 4 kg, and a seaweed-enhanced plant growth stimulant, 2.5 kg. The unit count is 6,500 g. Number of packs is 1. Item weight is not stated
Can the feature bullets be used?
No. They describe Autoglym car glass polish and a spray-on tyre dressing. They are not treated as garden-lime features.
Which plants does the spec name?
Non-ericaceous plants and vegetables. The coverage field says garden plants. There is no stated dose.
ALMICANNA’s 200 g pouch is Lithothamnium calcareum powder at £12.30, with an item weight of 206 g. The listing claims plant-available calcium and magnesium and more than 70 trace elements. Target species is cannabis; a question about other plants is unanswered. There is no dose and no star line, so the score is 0. Calcified seaweed is still a calcium carbonate, typically weaker per kilogram than ground limestone, and 200 g is a pouch rather than a bed dressing. This is a cannabis-oriented sample, not a substitute for a 4–8 kg garden-centre box.
Pros
Cons
Best for: A small pouch of calcified seaweed when cannabis is the crop on the listing
Less suitable: A brassica bed or anyone who needs ground limestone by the kilogram
Specifications
Common questions
What material does the listing name?
Dead deposits of Lithothamnium calcareum, a red alga from the Atlantic. The form is powder. Specific uses are plant growth and soil conditioning.
Which plants are named?
The target species is cannabis. A listing question about other plants is not answered.
How much is in the pack?
The unit count is 200 g. Item weight is 206 g. Number of items and number of packs are both 1. There is no stated dose and no star line.
Jolly Gardner pelletised limestone is listed at £123.16 for 14.1 kg, with 5,000 sq ft on the title and lawn grass as the target. Bullets claim calcium and magnesium and protection from moss and bare spots caused by low pH. There is no star line and no grams-per-square-metre rate. Pelleting does not raise neutralising value: you still need the same calcium carbonate. This is the dearest row in the set. It is a US-coverage lawn bag on amazon.co.uk, not evidence that pellets outperform a garden-centre box on a UK plot.
Pros
Cons
Best for: A large lawn when you specifically want this pellet bag and can store 14 kg
Less suitable: A small acid bed, or anyone treating 5,000 sq ft as a pH result
Specifications
Common questions
What form is this lime?
Pellets. The bullets say pelletised limestone with performance enhancers. Target species is lawn grass.
What coverage and weight are printed?
The title says 5,000 sq ft. Item weight is 14.1 kg. Unit count is 1. There is no grams-per-square-metre rate.
What does the listing say it adds?
Calcium and magnesium not supplied by fertilisers. It also claims to protect lawns from moss and bare spots caused by low pH. There is no star line and no review text.
Eight amazon.co.uk listings were scored from the stored pages. The score is the star rating multiplied by 20. A listing with no star line scores 0. There is no laboratory test, and no further deduction was applied. A score of 100 from one review is that star line, not a UK trial. The top pick is the highest score. The best value is the Westland twin 4 kg pack: about £19.98 for a listed 8 kg, with a printed 35–70 g per square metre rate and the largest UK review sample. It does not also hold the highest score. Prices are the figures stored with the listings, not a fresh shop check. The weight below sums to 100.
Amazon star line
100%The number on each card is the amazon.co.uk star rating multiplied by 20. Topline is 5.0 from 1 review, so 100. Westland granules, the 50 g powder and Encap are each 4.4, so 88. Four listings have no star line and score 0. Review counts stay in the label. They were not used as a second deduction. Pack size, a printed rate and label conflicts are shown in the table. They do not change this score.
Match the soil test, the liming material and the pack to the rate you will use. Prices below are the figures stored with the amazon.co.uk listings. This is not a laboratory test.
Garden lime, as the Royal Horticultural Society uses the name, is finely ground limestone or chalk. The active ingredient is calcium carbonate. You spread it or dig it in so acid soil becomes less acid. UK buyers are usually allotment and garden owners with a low pH reading, a brassica problem, or a bag that promises greener growth. You need a pack you can weigh. Garden lime is not a complete fertiliser, and it is not a pesticide. Take a soil test before you buy.
A garden-centre rate around 10 g per square metre, or 35–70 g, is not the Royal Horticultural Society table of roughly 0.4–1.8 kg per square metre toward pH 6.5.
Do not lime ericaceous plants. Lime after potatoes, not straight before them. Do not apply lime and manure, or lime and a nitrogen fertiliser, on the same day. Lime does not cure blossom end rot.
A 5.0 from one review, US review texts, and a saved note about chalk paint are not a UK soil trial. No listing here was lab-tested for a stated rise in pH.
Start with a current pH, taken at least three months after the last lime, fertiliser or organic matter. At pH 7.0 or above, the Royal Horticultural Society says liming is unnecessary. Do not lime rhododendron, camellia, heather or blueberry. The table aims at about pH 6.5 in the top 20 cm. Rough rates are 0.4–1.8 kg per square metre, depending on sand, loam or clay and the starting pH. Dig a correction into that layer. Above 0.5 kg per square metre, dig half in and leave half on the surface.
Set the pack against the rate you will actually use. A 4 kg box at about 1 kg per square metre on acid clay covers roughly 4 m². The same box at 10 g per square metre covers about 400 m². Westland’s UK page uses 10 g per square metre. A listing handful of 35–70 g per square metre is still not the Society’s kilogram table. Buy kilograms for a tested acid plot. Do not buy a 50 g jar, or a 200 g pouch, for an allotment correction. Read conflicts on the same page.
Three typical situations, each with a recommendation from this comparison.
You have a low pH reading and you need kilograms, not a slogan. Westland lime soil conditioner is two 4 kg boxes, listed weight 8 kg, at about £19.98. The printed rate is 35–70 g per square metre, dug in, and amazon.co.uk shows 4.4 from 974 reviews. That handful is not the Royal Horticultural Society kilogram table. An ericaceous question on the listing is unanswered.
You already wanted garden lime and a separate Epsom pack in one parcel. The Topline bundle names 4 kg garden lime and 1.5 kg Epsom salts at about £18.95, and the item weight of 5.5 kg matches those two bags. Vegetables and brassicas are named. There is no lime dose. The star line is 5.0 from one review with no text.
You want a few grams for homebrew, mushrooms or a craft use the listing names, not a soil correction. The 50 g calcium carbonate powder is about £3.95. The star line is 4.4 from 9 reviews, and the saved UK text is about chalk paint. There is no stated dose. It will not cover a bed at a kilogram rate.
The top pick by score is the Topline bundle of 4 kg garden lime and 1.5 kg Epsom salts at about £18.95. amazon.co.uk shows 5.0 from one review and no review text, which scales to 100. That is not a UK trial and not a measured pH rise. The best value is Westland lime soil conditioner, two 4 kg packs, at about £19.98 for a listed 8 kg, with 4.4 from 974 reviews and a printed 35–70 g per square metre rate. The 50 g jar is too small for a bed. Listings with no star line stay unbadged. None of these scores is a laboratory test.
Topline garden lime 4 kg and Epsom salts 1.5 kg
Highest score: 5.0 from one review scales to 100. There is no review text and no stated lime dose.
Westland lime soil conditioner, 4 kg (pack of 2)
About £19.98 for a listed 8 kg, with a printed 35–70 g per square metre rate and 4.4 from 974 reviews.
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 the figures stored with the eight amazon.co.uk listings, not a fresh shop check. A star line is not a measured pH rise. Hydrated lime is not one of these listings.
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.
