The best liquid lawn fertilisers, compared.
Top pick: GreenCare Autumn Lawn Feed, untitled size Best value: Westland Safelawn Liquid, 1 L – Lowest capture price with a printed rate, 50 ml per 4.5 L, about £8.90. Updated October 2026.
A liquid lawn fertiliser is a liquid feed you mix in a watering can or run through a hose-end bottle so grass can take up nutrients in the growing season or in autumn. In the UK you buy one when a lawn looks tired. The Royal Horticultural Society says most lawns grow well without feed, and that a granular product has less environmental impact if you do feed. A suitable bottle is a feed, not a weed or moss killer. Match the month on the label: a growing-season green-up is a different job from an autumn formula, and you should not push leafy growth hard after August. Read coverage beside the dose. A stated area only helps if the pack size agrees with the volume in the product data. Prefer a nutrient declaration you can read under the Fertilisers Regulations 1991. Homes without a hosepipe need a concentrate you can measure. A hose-end bottle needs a fitting you can control, and a double check valve where the label asks for one. See the [liquid lawn fertiliser buying guide](/hub/fertiliser-soil-and-bark-mulch/liquid-lawn-fertiliser/sub/liquid-lawn-fertiliser-buying-guide).
A liquid lawn fertiliser is a liquid feed you mix in a watering can or run through a hose-end bottle so grass can take up nutrients in the growing season or in autumn. In the UK you buy one when a lawn looks tired.
22 products checked · 61 hrs invested · +18,640 readers
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Personal buying guide
Question 1 of 2
When are you feeding the lawn?
The Invigortex GreenCare autumn liquid with no size in the title is listed at about £12.95 as an autumn and early-winter watering-can feed at 5 ml per litre. Across 1 amazon.co.uk review the star line is 5.0, scaled to 100. That is one truncated United Kingdom text calling the product and the service very good, not a ranking against 627 reviews. The title states no litres. Unit count and liquid volume say 10,000 ml, item weight is 5 kg, and the same bullets name both 500 m² and 1,000 m². The listing does not print an NPK, and criticism and defect lists are empty because the sample is one line. It is an autumn-labelled concentrate only if you confirm the fill on the bottle you receive. Skip it if you needed a proven litre size, a printed nutrient mark, or a review sample that can be weighed.
Pros
Cons
Best for: An autumn buyer who will read the cap before paying, and who already wanted a seaweed watering-can mix.
Less suitable: Anyone treating 5.0 from one review as a top pick, or anyone who needed a proven 5 L or 10 L.
Specifications
Common questions
What size is this bottle?
The title does not state a size. Unit count and liquid volume say 10,000 ml. Item weight is 5 kg. Coverage bullets name both 5 L and 10 L. The product data does not resolve the clash.
When is it meant to be used?
The bullets say autumn and early winter. The spring-use question is unanswered. Dilute 5 ml per litre and apply with a watering can or suitable sprayer.
How many reviews sit on this ASIN?
The star line is 5.0 from 1. The saved listing has one truncated United Kingdom text. Criticism and defect lists are not in the capture.
The Invigortex GreenCare autumn liquid titled 5 L is listed at about £19.95, with the same GC-GFEED model and a 5 ml per 1 litre watering-can rate. Across 1 amazon.co.uk review the star line is 5.0, scaled to 100 from one truncated United Kingdom text. That is the same pattern as the untitled and 10 L titles, not a separate proof of winter hardiness. The title says 5 L. Unit count and liquid volume say 10,000 ml. Item weight is 5 kg. Coverage bullets still name both 500 m² and 1,000 m². The product data does not resolve the clash, and the listing does not print an NPK. Buy it only if the bottle in your hand matches the 5 L title you paid for. Skip it if you needed a firm cost per square metre or a review sample deeper than one line.
Pros
Cons
Best for: An autumn watering-can job if you will check that the delivered bottle is the 5 L you ordered.
Less suitable: Anyone publishing a cost per square metre from the 500 m² line, or anyone who needed 627 reviews.
Specifications
Common questions
Is this a 5 L bottle?
The title says 5 L. Unit count and liquid volume say 10,000 ml. Item weight is 5 kg. The product data does not resolve the clash.
How do I apply it?
Dilute 5 ml per 1 litre and apply with a watering can or suitable sprayer. The bullets say autumn and early winter.
Are the reviews unique to this 5 L title?
The star line is 5.0 from 1. The saved listing has one truncated United Kingdom text, the same pattern as the other two GreenCare GC-GFEED captures.
The Invigortex GreenCare autumn liquid titled 10 L is listed at about £39.95, the premium capture in this set, with a watering-can rate of 5 ml per 1 litre. Across 1 amazon.co.uk review the star line is 5.0, scaled to 100 from one truncated United Kingdom text. That line does not outrank 4.6 from 627, and it does not prove a 1,000 m² cover. The title, unit count and liquid volume say 10 L. Item weight is 5 kg. Coverage bullets still name both 500 m² and 1,000 m². Pets-and-children and how-often questions are unanswered in the bullets, and the listing does not print an NPK. It is the dearest autumn title here, not a proven 10 L winter feed. Skip it unless you can read the litres on the cap before you keep the bottle.
Pros
Cons
Best for: A buyer who already wanted the 10 L GreenCare title and will weigh or measure the fill on arrival.
Less suitable: Anyone treating one five-star line as a winter-hardiness test, or a small lawn that only needed a 1 L growing-season bottle.
Specifications
Common questions
Is this a 10 L bottle?
The title, unit count and liquid volume say 10 L. Item weight is 5 kg. The product data does not resolve the clash.
Does the listing say it is safe for pets and children?
That question is unanswered in the bullets. Dilute 5 ml per 1 litre and apply with a watering can.
How many reviews sit on this ASIN?
The star line is 5.0 from 1. The saved listing has one truncated United Kingdom text. Criticism and defect lists are not in the capture.
The Miracle-Gro Fast Green concentrate pack is two 1 L bottles at about £13.54, titled March to September and up to 100 m² per unit, for homes without a hosepipe. Across 627 amazon.co.uk reviews the star line is 4.6, scaled to 92 from the first 50 United Kingdom texts. That is the strongest weighted score among the three growing-season bottles, and not a laboratory ranking. Reviewers dilute it in a watering can and often describe greener colour in a few days to about two weeks on tired or newly laid turf. The capture has no millilitre-per-litre rate, so you still have to read the bottle you hold. One review says apply evenly with a fine rose or the grass may burn, and several short reviews report no visible difference. It is the top pick here when you wanted a measured can feed with a real review sample, not a hose meter and not a 5.0 from one truncated autumn text.
Pros
Cons
Best for: A small or front lawn without a hosepipe when you wanted a growing-season concentrate with a real UK review sample.
Less suitable: Anyone who needed a printed millilitre dose before buying, a hose-end bottle, or an autumn formula.
Specifications
Common questions
What is in the pack?
Number of packs and number of items are 2. Unit count is 2,000 ml and liquid volume is 2 L. The bullets say each unit is 1 litre concentrate with up to 100 m² coverage.
When can I apply it?
The bullets say anytime between March and September, and they name households without a hosepipe. The capture has no millilitre-per-litre rate.
Do the reviews mention scorch?
One UK review says apply evenly with a fine rose or the grass may burn, and that larger lawns should use granules. Several short reviews report no visible difference.
The Westland Safelawn 1 L bottle is a watering-can liquid at about £8.90, printed at 50 ml per 4.5 L for 5 m² and about 100 m² per litre from March to October, not in frost. Across 134 amazon.co.uk reviews the star line is 4.4, scaled to 88 from 26 United Kingdom texts, which is not a laboratory ranking. Reviewers who used it through summer often report a greener lawn after about a week to ten days, and several paired it with reseeding on brown patches. The same sample includes people who saw no change after two to four weeks and called it overrated or poor value. The concentrate is thick enough that one sprayer failed to pick it up, and the printed rate goes quickly on a larger lawn. It is the best value here when you wanted a 1 L can mix with a printed dose, not a hose-end bottle and not an autumn title with one review.
Pros
Cons
Best for: A small or medium lawn you will treat from a watering can when you wanted a printed millilitre rate at the entry price.
Less suitable: A hose-only job, a September leftover-nitrogen feed, or anyone who needed a hose-end bottle.
Specifications
Common questions
How do I dilute this bottle?
The listing states 50 ml per 4.5 L of water to cover 5 m². Shake first. Apply every 1–2 weeks from March to October when the grass is growing. Do not apply when frost is expected.
How much lawn does 1 L cover?
The coverage field says approximately 100 m². Unit count and liquid volume both say 1 L. Item weight is 990 g.
Does the listing say it is pet safe?
The bullets say keep the bottle away from children, pets and food. Several UK reviews call it pet friendly. That is reviewer language, not a printed guarantee on the listing.
The Miracle-Gro EverGreen Fast Green Spray & Feed 1 L is a ready-to-use hose-end bottle at about £11.70, printed up to 100 m². Across 4,294 amazon.co.uk reviews the star line is 4.3, scaled to 86 from the first 50 United Kingdom texts. That is the deepest sample here, and still not a lab test. Reviewers often describe patchy or brown grass looking greener after a few days to about two weeks. The 24-hour claim is not what those texts report. The same first 50 include a connector that pops off or leaks, an on/off trigger with no level marks, and bottles that barely drop then dump, or stay half full after 30 minutes. Several users poured the liquid into a watering can after the head failed, and overspray has stained slabs or fencing. It fits a hose owner who will watch the bottle level, not a home without a tap or anyone who needed a printed millilitre dose.
Pros
Cons
Best for: A hose owner who will watch the bottle empty across up to 100 m² in the growing season.
Less suitable: A household without a hosepipe, or anyone who needed a measured cap in a watering can.
Specifications
Common questions
Do I dilute this bottle?
The bullets say ready to use and attach to a hose. The mixing-ratio field is 1:0:0. That is not a millilitre dose and it is not an NPK.
How much lawn does 1 L cover?
The coverage field says up to 100 m². Unit count and liquid volume both say 1 L. Item weight is 1.14 kg.
What do the first 50 UK reviews say about the hose fitting?
Several texts describe a connector that pops off or leaks, an on/off trigger with no level marks, and inconsistent metering. Some users poured the liquid into a watering can.
Six 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. A dose, a coverage line or a pet line is the seller's claim unless a named maker sheet or label says otherwise. Where the title and the volume field disagree, both stay. A 5.0 from one review does not outrank 4.6 from 627. The top pick is the highest weighted score among the growing-season bottles with a real review sample. The best value is the lowest capture price that still prints a millilitre rate. The weights below sum to 100.
Review evidence
30%Star rating on amazon.co.uk, then the size of that review file. 4.6 from 627 and 4.3 from 4,294 can be weighed. 5.0 from one truncated text cannot outrank them. The numeric row on a one-review listing is the star line scaled, not a win.
Season and job
25%A growing-season liquid, a hose-end green-up and an autumn formula are different jobs. The RHS says not to push leafy growth after August, and to use an autumn formula from September to mid-October only if the lawn needs it. None of these listings claims to kill weeds.
Dose and pack clarity
25%A printed millilitre rate, a coverage figure, and a pack size that agrees across the title and the volume field. A missing rate, or a title that disagrees with the volume field, is a deduction. An NPK printed only on another sheet is not copied onto a listing that omits it.
Value
20%Pounds against the stated area only when coverage is unambiguous. The lowest capture price with a printed rate is the best value. A higher price on one review and a conflicting area is not scored as the saving.
Match the season and the applicator before you match the star line. A hose-end spray, a watering-can concentrate and an autumn liquid are not one ladder. Prices below are amazon.co.uk shelf prices on 19 October 2026. This is not a laboratory test.
Liquid lawn fertiliser on amazon.co.uk is a feed you apply from a watering can or a hose-end bottle. Buyers want a greener lawn in the growing season or an autumn mix. The Royal Horticultural Society says most lawns grow well without feed, and that a granular feed has less environmental impact if you do feed. If you still use a liquid, match the job before the star line. Confirm it is a feed. Weed-and-feed and moss killers are plant protection products.
Westland's printed rate is 50 ml per 4.5 L, every one to two weeks, and not when frost is expected. One concentrate review says an uneven can with a coarse rose can scorch grass. Larger lawns in that review were pointed toward granules.
The hose-end bottle has an on/off trigger and no level marks. The first 50 UK texts include connectors that pop off, leaks, and bottles that barely drop and then dump. Watch the bottle empty. Do not leave the hose in a bucket or a drain.
A 5.0 from one truncated review does not outrank 4.6 from 627. The three autumn titles disagree with their own 10,000 ml and 5 kg fields, and the bullets name both 500 m² and 1,000 m². Read the cap. These feeds do not claim to kill weeds.
Name the month and the tool before the price. A liquid for March to September is a growing-season green-up. Westland's window runs to October and stops in frost. The autumn bullets say autumn and early winter. The RHS says most lawns need no feed, that you should stop pushing leaf after August, and that an autumn formula is for September to mid-October only if the lawn needs it. A high-nitrogen summer feed in winter is the wrong job. The applicator is the next split.
A coverage line is only useful beside the dose and a pack size that agrees with itself. Westland prints 50 ml per 4.5 L for 5 m² and about 100 m² from 1 L. Unit count and liquid volume both say 1 L, and the weight is 990 g. That is the clearest rate in the set, at about £8.90. The hose bottle prints up to 100 m² and a mixing field of 1:0:0, which is not a millilitre dose. The twin pack prints up to 100 m² per 1 L unit, and the capture has no millilitre rate.
Three typical situations, each with a recommendation from this comparison.
You have no hosepipe and you want a growing-season feed you can dilute in a watering can. Miracle-Gro Fast Green concentrate, pack of 2 × 1 L, is the top pick at about £13.54, with 4.6 from 627 reviews. The bullets name March to September and up to 100 m² per unit. The capture has no millilitre rate, and one review says an uneven pass can scorch the grass.
You will attach a bottle to a hose and watch it empty. Miracle-Gro EverGreen Fast Green Spray & Feed, 1 L, is ready to use, up to 100 m², at about £11.70, with 4.3 from 4,294 reviews. The first 50 UK texts include connectors that pop off, leaks and no level marks. It is a poor fit if you needed a measured cap.
You want an autumn or early-winter liquid and you will read the cap before you keep the bottle. GreenCare Autumn Lawn Feed, 5 L title, is about £19.95, diluted at 5 ml per litre. The title says 5 L. The volume field says 10 L and the weight says 5 kg. The star line is 5.0 from one truncated review, which does not outrank 4.6 from 627.
The top pick for a growing-season lawn without a hosepipe is Miracle-Gro Fast Green concentrate, pack of 2 × 1 L, at about £13.54. amazon.co.uk shows 4.6 from 627 reviews, the bullets name March to September and up to 100 m² per unit, and the capture has no millilitre rate. The best value is Westland Safelawn Liquid, 1 L, at about £8.90, with 50 ml per 4.5 L for 5 m² and about 100 m² per litre, and 4.4 from 134 reviews. The hose-end 1 L is about £11.70 and up to 100 m², with connector complaints in the first 50 UK texts. The three autumn titles share one truncated review and a size clash. None of these scores is a laboratory test.
Westland Safelawn Liquid, 1 L
Lowest capture price with a printed rate, 50 ml per 4.5 L, about £8.90.
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 six amazon.co.uk listings captured on 19 October 2026. A pet-friendly review is not a guarantee. The GreenCare litre fields are not reconciled. Westland NPK 6-2-4 is the brand sheet, not a figure printed on that amazon capture. The hose-end 27-0-0 is the 2025 label, not a figure for the concentrate or the autumn titles. The Farming Rules for Water bind agricultural land managers in England, not a typical householder.
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.
