The best weed killers, compared.
Top pick: Roundup Pump 'N Go 5 litre refill Best value: Resolva 24H 1 litre – Lowest shelf price for a ready-to-use trigger with at least 1,000 reviews and a printed area: about £9.70 for 35 square metres, 4.3 from 2,203 reviews. Updated October 2026.
A weed killer here is an authorised plant protection product that kills unwanted plants: a ready-to-use spray, a pump-bottle refill, or a concentrate you dilute. On amazon.co.uk you are usually choosing for paving joints, a gravel drive, or a bed edge. The first split is whether the listing claims a systemic root kill or only a contact scorch. A path and drive bottle is not one formula, and it is not permission to spray a lawn. Non-selective products kill grass. This comparison keeps seven herbicide listings and leaves out tools, membrane and an empty sprayer. Shelf prices run from about £9.70 for Resolva 24H to about £25.99. The top pick is Roundup Total Fast Action, two 1 litre sprays, at about £12.98, with 4.4 from 17,077 reviews. The best value is Resolva 24H at about £9.70, with 4.3 from 2,203 reviews and 35 square metres printed. Glyphosate stays approved in Great Britain until at least 15 December 2026 while renewal is assessed. That date is not a ban. The decision by chemistry, surface and pack is in the [weed killer buying guide](/hub/weed-control/weed-killer/sub/weed-killer-buying-guide).
A weed killer here is an authorised plant protection product that kills unwanted plants: a ready-to-use spray, a pump-bottle refill, or a concentrate you dilute.
26 products checked · 52 hrs invested · +17,200 readers
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Personal buying guide
Question 1 of 2
Where are the weeds?
The Roundup Pump 'N Go 5 litre is a glyphosate refill at about £25.99, not a sprayer, and the listing claims a systemic root kill with results visible in 1–2 days. amazon.co.uk shows 4.6 from 7,749 reviews. The bullets say the matching pump sprays for up to 3 minutes continuously once you have filled it. In 50 United Kingdom reviews, people pour the liquid into a Pump 'N Go they already own, because this tub's cap does not take the pump. They report wilting in a couple of days on paths, driveways, fence lines and gravel, with a fuller die-back around a week in some accounts. Weeds return after a few months unless you repeat the spray. One review says it stained block paving and that hosing did not lift the mark, and another says it missed ivy. Child safety is asked and not answered on the listing.
Pros
Cons
Best for: Paths, driveways, fence lines and gravel when you already own a Pump 'N Go and you want 5 litres of glyphosate without mixing.
Less suitable: Block paving you cannot risk marking, ivy, or a first purchase if you do not already own the sprayer.
Specifications
Common questions
Does this bottle include the sprayer?
No. It is a refill for the Fast Action Roundup Pump 'N Go. Reviews say the pump does not screw onto this tub, so they pour the liquid across.
Does the listing say it is child safe?
Child safety is asked and not answered in the specification block.
Will it mark a patio?
Patios are asked and not answered on the listing. One review says it stained block paving and hosing did not lift the mark.
The Topline Xpress 24H is a 5 litre refill at about £23.99 for a power pump you buy separately, and the listing prints about 125–250 square metres. amazon.co.uk shows 4.6 from 152 reviews. It is glyphosate-free and kills by contact and desiccation, with visible results claimed in 24 hours. The named chemical is not printed. In 32 United Kingdom reviews, pathways brown within hours to about three days, though one heatwave review was slower than the 24-hour claim. The same weeds return because there is no root claim, large perennials may need a repeat, and woody parts are not affected. One bullet lists lawn weeds such as dandelions and clover, while another describes a non-selective kill, and reviews say it killed grass. Drift is a complaint, and pet safety is asked and not answered, though the bullets say the formula is non-hazardous to bees.
Pros
Cons
Best for: Pathways when you already own the power pump and you want a glyphosate-free contact spray over a large printed area.
Less suitable: A lawn you want to keep, woody weeds, or a first bottle if you do not already have the pump.
Specifications
Common questions
Is this a selective lawn weed killer?
The bullets conflict. One lists broad-leaved lawn weeds. Another says a non-selective contact kill, and reviews say it killed grass.
Does it claim a root kill?
No. It kills by contact and desiccation. Large perennial weeds may need a repeat, and woody parts are not affected.
What does it say about pets and bees?
Pet safety is asked and not answered. The bullets say the formula is non-hazardous to bees.
The Gallup bottle is 1 litre of concentrate at about £21.75, stated as 360 g/L glyphosate, which you dilute and apply with a sprayer. amazon.co.uk shows 4.5 from 558 reviews. The listing names paths, driveways, patios and garden areas, and says instructions for safe use are included. In 50 United Kingdom reviews, weeds brown once the mix is right, and the bottle is described as a lot of spray from one purchase. One review puts the visible result at about two weeks, and one says the recommended dilution makes about 40 litres, which is a review figure rather than printed coverage. Several reviews say the parcel had no dilution instruction, so the mix was left to the buyer. Reviewers also say it kills plants it hits, and pet safety is asked and not answered on the listing.
Pros
Cons
Best for: A large path or garden area when you already own a sprayer and you can read a dilution rate before you mix.
Less suitable: A spot treatment you want to spray straight from the bottle, or plants you cannot keep the spray off.
Specifications
Common questions
Do you have to mix it?
Yes. Dilute it and apply with a sprayer. Several reviews say the parcel had no dilution instruction.
Does the listing say it is safe for pets?
Pet safety is asked and not answered in the specification block.
Does the listing answer the ivy question?
Ivy is asked and not answered. The bullets name grassy and broad-leaved weeds.
The Roundup Total Fast Action pack is two 1 litre ready-to-use sprays at about £12.98, so you do not mix. amazon.co.uk shows 4.4 from 17,077 reviews, and the listing is rank 1 in Weed Killers. The bullets name glyphosate, claim a root kill with visible results in 1–2 days, and say children and pets need not be kept off once the spray is dry, if you treat the weed only. In 50 United Kingdom reviews, patio, paving and driveway-edge weeds often wilt within a couple of days when the weather stays dry, with a fuller die-back around a week. Several reviews say the sprayer leaks slightly, and some see the same patches return within weeks. Rain is a repeated condition in the sample. It is the top pick here for weeds you can spray one by one, and a poor fit for a lawn you want to keep.
Pros
Cons
Best for: Patio joints, paving and driveway edges when you want glyphosate ready to spray and you will keep it off plants you want.
Less suitable: A lawn you want to keep, a glyphosate-free brief, or a large area where you need a printed coverage figure.
Specifications
Common questions
How soon does the listing say you will see a result?
Visible results in 1–2 days. Reviewers often say a few days, with a fuller die-back around a week.
Will it spare plants next to the weed?
The listing says apply to the weed only. Reviewers say it damages grass and other plants if they are sprayed.
Do reviewers like the trigger?
It is a ready-to-use spray. Several reviews say the sprayer leaks slightly.
The Resolva 24H is a 1 litre ready-to-use trigger spray at about £9.70, and the listing says it treats 35 square metres. amazon.co.uk shows 4.3 from 2,203 reviews. The bullets claim a root kill on annual and deep-rooted perennial weeds, including grasses, docks, nettles, dandelions and bindweed, with visible results after 24 hours. The named active is not printed. In a sample of 50 United Kingdom reviews, the stream is used on beds and the wide angle on larger areas, and rain is mentioned often. Some results took longer than the 24-hour claim, thistles were not all dead in at least one review, and a small number mention a leak. At about £9.70 for a trigger bottle with a printed area and 2,203 reviews, it is the best value in this set. Patio use and child safety are asked and not answered on the listing.
Pros
Cons
Best for: Beds and borders when you want a 1 litre trigger spray and a printed 35 square metre figure.
Less suitable: A patio the listing does not answer, or a buy where you need the active named before you spray.
Specifications
Common questions
Does the listing say it is safe for children?
No. Child safety is asked and not answered in the specification block.
Can you use it on a patio?
Patio is asked and not answered. The listing describes a stream for beds and borders, and a wide angle for larger areas.
Which weeds does it name?
Grasses, docks, nettles, dandelions and bindweed, with a root claim for annual and deep-rooted perennial weeds. Reviews include thistles that were not all dead.
The Resolva Path & Drive 3 litre is a liquid at about £18 for paths, drives, patios and gravel, with visible results claimed within hours. amazon.co.uk shows 4.3 from 46 reviews. The named active is pelargonic acid, and the bullets do not claim a root kill. They do claim a dual action on weeds and moss, an effect on algae on hard surfaces, and use all year round. In 23 United Kingdom reviews, paths and drives are described as clearer and the effect as fast, though a minority report no useful kill. Regrowth comes up in the sample, and moss is mentioned less often than weeds. Pet safety is asked and not answered, and no square-metre coverage is printed.
Pros
Cons
Best for: Paths, drives, patios and gravel when you want pelargonic acid and a moss line on the same bottle.
Less suitable: Deep-rooted perennials you need killed at the root, or a buy that depends on a large review file.
Specifications
Common questions
Can you use it on gravel?
Yes. The bullets list paths, drives, patios and gravel.
Does it claim to kill moss?
Yes. Dual action against weeds and moss, and it affects algae on hard surfaces.
Is there a pet line?
Pet safety is asked and not answered in the specification block.
The Resolva Path & Drive 5 litre is a ready-to-use power pump at about £25.99 for paths, drives, patios and gravel. amazon.co.uk shows 3.8 from 27 reviews, the lowest star line in this set. The bullets claim a dual action on weeds and moss, an effect on algae, and visible results within hours, all year round. The named active is not printed. In 14 United Kingdom reviews, some weeds die on contact or within a few hours, and one drive was cleared, but the pump is the repeated fault: no pressure, a seal out of place, a very short lance, or a leak. One reviewer says it is contact only and will not kill deep-rooted perennial weeds. A few say the built-in sprayer works. There is no square-metre figure and no children or pets line in the file.
Pros
Cons
Best for: A path, drive, patio or gravel area when you want weeds and moss in one ready-to-use 5 litre pump.
Less suitable: Deep-rooted perennials, or a sprayer you need the reviews to describe as reliable.
Specifications
Common questions
Can you use it on gravel and patios?
Yes. The bullets list paths, drives, patios and gravel.
Does it kill moss?
The listing claims a dual action against weeds and moss, and an effect on algae on hard surfaces.
What do reviewers say about the pump?
In 14 reviews in the raw file, the pump is the repeated fault: no pressure, a loose seal, a short lance, and leaks. A few say the sprayer works.
Seven weed killers on amazon.co.uk were scored on 16 October 2026 from listing facts and United Kingdom review notes, not from a laboratory test. The starting point is the star average times 20. A review-count band then moves the score, listing points are added, and fault cuts come off last. Price does not enter the score. Price decides only the best-value badge. The score ranks a listing inside this set. It is not an HSE authorisation.
Amazon stars
60%The amazon.co.uk star average, times 20, is the base. A 4.4 becomes 88 and a 4.6 becomes 92. The star line on each product stays the UK listing figure.
Review volume
15%A review-count band then moves the base: −8 under 50 reviews, −4 from 50 to 199, −1 from 200 to 999, +1 from 1,000 to 4,999, and +3 at 5,000 or more.
Listing points
15%Points are added for a named active, a root or contact action, numeric coverage, surfaces named on the listing, a children-and-pets line, a ready-to-use sprayer in the box, and a moss or algae claim.
Fault cuts
10%Cuts come off last: sprayer leaks, missing dilution instructions, a lawn bullet that conflicts with a non-selective kill, a block-paving stain, a refill cap that will not take the pump, and pump failure as the main review theme.
Start with the mode of action printed on the bottle, then the surface, then the pack, then coverage only where square metres are printed. Authorisation and the faults reviewers actually name come after the price. None of the scores is a laboratory test.
A weed killer in this set is an authorised plant protection product that kills unwanted plants. The pack is a ready-to-use spray, a named refill, or a concentrate you dilute. On amazon.co.uk the usual job is paving joints, a gravel drive, or a bed edge. The first split is the mode of action printed on the listing: glyphosate with a root claim, or a contact scorch such as pelargonic acid or a glyphosate-free contact line. Do not treat path and drive as one formula.
Resolva Path & Drive 3 litre names pelargonic acid and does not claim a root kill. Topline is glyphosate-free and kills by contact. Only the two Roundup packs and Gallup name glyphosate. Gallup does not state a systemic action.
A brown leaf is not a root kill. HSE guidance expects a contact spray to need a repeat on large perennial weeds. Topline reviews say the same weeds return, and woody parts are not affected.
One Topline bullet lists lawn weeds such as dandelions and clover. Another describes a non-selective kill, and reviews say it killed grass. A path and drive label is not a lawn permission.
Read the mode of action before the brand. Glyphosate with a root claim, in this set, is Roundup Total Fast Action at about £12.98 and the Pump 'N Go 5 litre refill at about £25.99. Resolva 24H claims a root kill and does not print the active. Contact pattern is Resolva Path & Drive 3 litre, which names pelargonic acid, and Topline Xpress 24H, which is glyphosate-free and kills by desiccation. Gallup states 360 g/L glyphosate and does not say systemic.
Use a square-metre figure only where the listing prints one. Resolva 24H prints 35 square metres. Topline prints about 125–250 square metres. The other five do not. One Gallup review mentions about 40 litres of mix. That is a review, not printed coverage, so it is not a price per square metre. Weed killers must be authorised. Amateur products are for untrained gardeners. Professional products are not. None of these files prints a MAPP number.
Three typical situations, each with a recommendation from this comparison.
You are spraying paving joints and driveway edges one weed at a time, and you want glyphosate ready to use. Roundup Total Fast Action is two 1 litre sprays at about £12.98, with 4.4 from 17,077 reviews. Several reviews say the sprayer leaks, and some patches return within weeks. It kills grass if the grass is sprayed.
You want a 1 litre trigger for beds and borders, and a printed coverage figure. Resolva 24H is about £9.70 for 35 square metres, with 4.3 from 2,203 reviews. The bullets claim a root kill. The named active is not printed, and patio use is asked and not answered.
You already own a Pump 'N Go and the drive is long. The 5 litre glyphosate refill is about £25.99, with 4.6 from 7,749 reviews and a systemic root claim. The cap does not take the pump, so you decant. One review says it stained block paving. This is not a first sprayer.
In this set of seven amazon.co.uk listings, the top pick is Roundup Total Fast Action, two 1 litre ready-to-use sprays, at about £12.98. It scores 95: glyphosate named, a root kill claimed, a children-and-pets-once-dry line, and 4.4 from 17,077 reviews. Several reviews say the sprayer leaks. The best value is Resolva 24H at about £9.70, a ready-to-use trigger with 35 square metres printed and 4.3 from 2,203 reviews. The named active is not printed. The Roundup two-pack is about £6.49 a litre and scores higher, so it keeps the top pick. The 5 litre refills are cheaper per litre only if you already own the pump. None of these scores is a laboratory test or an HSE authorisation.
Resolva 24H 1 litre
Lowest shelf price for a ready-to-use trigger with at least 1,000 reviews and a printed area: about £9.70 for 35 square metres, 4.3 from 2,203 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 sources from the research digest, last checked on 16 October 2026. Shelf prices and star lines are the amazon.co.uk figures in the display file. This page did not run a laboratory test and does not confirm a MAPP number.
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are from the UK listings checked on 16 October 2026. We did not lab-test these weed killers.
