Rosate weed killer: the label dilution rate, and who is allowed to use it

Rosate 360 TF mixes at 16 ml per litre of water for general use and 24 ml where perennial broad-leaved weeds are present. Both figures are off its own label. The part nobody puts next to them is that Rosate is professional-use only, always has been, and the identical 360 grams of glyphosate a litre sits on the amateur register where anyone can buy it.

By The Weed GuyLast updated 2 September 2026

The short version

16 ml per litre of water for general use, 24 ml where perennial broad-leaved weeds are present, and a litre of that spray covers about 40 square metres. Rosate 360 TF is 360 g/L glyphosate under MAPP 17682, made by Albaugh, and it is authorised for professional use only. So is every other Rosate that has ever existed here. If you do not hold a certificate, the product that does the same job at the same concentration is an amateur 360 g/L concentrate such as Gallup Home & Garden, and buying that one is not an offence.

Every Rosate 360 TF rate, off its own label

The label carries more than a dozen separate rate tables, and the one people actually need is the Knapsack Rate Estimator. These are its figures, plus the jobs it handles as a ratio rather than a rate.

The job	Label rate	Per litre of water	Worth knowing
Hard surfaces, paths and farm roadways	4.0 l/ha in 250 l/ha of water	16 ml	One litre of the made-up spray covers about 40 square metres. This is the number most people are looking for.
The same ground with perennial broad-leaved weeds in it	6.0 l/ha in 250 l/ha of water	24 ml	Still 40 square metres a litre. The stronger rate buys you a harder weed, not more ground.
Woody weeds in forestry after planting: bramble, willow, ash, sycamore, oak, hazel	3.0 l/ha in 250 l/ha of water	12 ml	The lowest rate printed anywhere on the label, and it is for the toughest-looking plants on it.
Rhododendron, by knapsack	10 l/ha, or 8 l/ha with an authorised adjuvant	40 ml, or 32 ml with the adjuvant	The only place on the whole label where an adjuvant is called for, at 2 per cent of the final spray volume.
A freshly cut stump	One part product to nine parts water for deciduous, one to four for conifer	Not a knapsack rate at all	A 10 and a 20 per cent solution. The authorisation caps stump work at 20 per cent, so that is the ceiling.
A weed wiper	One part product to two parts water on a Weedwiper Mini	Wiped on, never sprayed	Other wipers go to one to one, or one to two in warm dry conditions. Those maxima are conditions of the authorisation.

The two knapsack figures come from boom rates of 4.0 and 6.0 litres per hectare applied in 250 litres of water per hectare, which is the calculation the label does for you. Scaled to real tanks at the general rate: 80 ml in a 5 litre pressure sprayer, 240 ml in a 15 litre knapsack, 256 ml in a 16 litre one. The method for doing that with any label at all, in any tank, is worked through on the glyphosate concentrate strengths and mixing rates resource, and that is the page to read before you measure anything.

Why every website gives you a different number

Go looking for this rate and you will be told 15 ml per litre, 20, 25, 35, and on the gardening forums anything from 5 to 50. One retailer manages to print two different answers on the same page. Another calls 20 ml per litre the minimum, when the label's general rate is 16. They cannot all be right, and the disagreement is not sloppiness alone. There is a real reason for it, and I have not found a single page that explains it.

Millilitres per litre is not a property of the product. It is a property of how you walk. A pesticide label doses by ground, not by water: everything on Rosate's label is set in litres of product per hectare of land. To turn that into something you can pour into a jug, you have to assume a spray volume, and the label's estimator assumes 250 litres of water per hectare, which is the same thing as saying one litre of made-up spray wets 40 square metres.

Change that assumption and the millilitre figure moves without the dose changing at all. The label permits a knapsack to apply between 100 and 250 litres of water per hectare on hard surfaces. At 250 litres, the general 4 l/ha rate is 16 ml per litre. At 100 litres, the very same authorised dose becomes 40 ml per litre. Both numbers are the same amount of glyphosate landing on the same ground. That is why the internet argues with itself, and why quoting a millilitre figure without the water volume behind it is close to meaningless.

Which gives you the one number that actually keeps you straight: the ceiling. The maximum individual dose for hard surfaces, natural surfaces not intended to bear vegetation and permeable surfaces overlying soil is 6 litres per hectare, and at the label's own 250 l/ha assumption that is 24 ml per litre. So if you are spraying at normal knapsack coverage and somebody tells you 35 or 40 or 50 ml per litre, you are being told to go over the maximum authorised dose. The label's own words for that are that using the product in a manner inconsistent with the label may be an offence.

One more source of the confusion, which is fixable in ten seconds. Some of the rate tables circulating online belong to Rosate 36, an expired registration, not to Rosate 360 TF. That older label allowed a knapsack up to 300 litres of water per hectare rather than 250, so every millilitre conversion derived from it comes out different. Check the MAPP number on the drum in front of you, not the brand on the front.

There is no amateur Rosate, and there never has been

This is the thing that makes Rosate different from every other weedkiller brand people search for, and it rarely gets said.

Gallup has an amateur member: Home & Garden, MAPP 17672, on open sale. Roundup has several, from trigger bottles at 7.2 g/L up to Roundup Ultra at 360 g/L. So for those brands the useful question is which one you are holding. Rosate has never had one. Go through every Rosate authorisation on the HSE register, current and dead, and the Amateur or Professional field reads Professional on all of them.

Which means the question "which Rosate can I use" has a short answer, and it is none of them. That is not a warning about strength. Rosate 360 TF is 360 grams of glyphosate a litre, and 360 g/L is also the ceiling of the amateur liquid range in Great Britain, so the chemistry on both sides of that line is identical. The line is about training.

And the amateur register is not one lonely exception either. Search it for glyphosate at exactly 360 g/L and you get a row of them: Gallup Home & Garden (MAPP 17672), Roundup Ultra (18850), Doff WeedOut 360 Super Concentrate (18313), 360gl Super Concentrated Weedkiller (19830), Weedblast Root Kill Super Strength (20046), Weedkiller 360 (17723) and WeedGone Pro H360 (21808). Seven separate authorisations at the same number as the professional drum, every one of them approved for someone with no training at all.

So anybody who bought Rosate because they believed professional was the only route to 360 g/L bought it on a false premise. The practical version: if you hold a certificate, Rosate is a perfectly ordinary amenity concentrate and this page is a rate table for you. If you do not, what you actually want is one of those amateur bottles, mixed to its own rate rather than to Rosate's. The wider case for why that ceiling exists is on strongest weed killer UK, which works through the whole legal ladder rather than one brand.

Only one Rosate is still authorised

Five Rosate registrations have existed in Great Britain. Four of them have gone, two as recently as last year, and no retail listing anywhere mentions it.

Product	MAPP	Where it stands	Who it was for
Rosate 360 TF	17682	Authorised. The single GB and NI entry was split into separate GB-only and NI-only rows in August 2025	Professional
Rosate Green	15122	Commercial withdrawal notice issued April 2025, authorisation expiry 30 June 2025	Professional
Rosate 36 SL	15263	Expired 30 June 2018	Professional
Rosate 36	14459	Expired 30 June 2018	Professional
Rosate 360	13434 and 13459	Withdrawn September 2007, and held by a different company entirely	A separate registration, long gone

Two oddities in that table are worth explaining rather than leaving to look like mistakes. The first is that the register gives Rosate 360 TF a first authorisation date of August 2025, which is not when the product appeared. Its original authorisation is numbered 1790 of 2016 and was issued on 25 July 2016. What happened last year is that HSE withdrew the single combined Great Britain and Northern Ireland entry and split the MAPP number into two separate rows, one for each. The product never went anywhere.

The second is the expiry date, which the register prints as 09/09/2099. That is a placeholder rather than a date. HSE's own note says that where 09/09/2099 appears, an extension of authorisation under Article 43 has been applied and the authorisation will be withdrawn once a regulatory decision is taken. So the real end date is unknown, not seventy-odd years off, and that sits alongside the wider question of whether glyphosate is banned in the UK rather than being a Rosate story of its own.

One more thing to check against a listing rather than a memory. Rosate is an Albaugh product, not a Barclay one. People mix it up with the Gallup range constantly, and there is a good reason for the confusion: Gallup XL prints the identical knapsack rates, 16 ml and 24 ml per litre, off an identical 360 g/L. Two rival products, two different manufacturers, and the same two numbers. That is what it looks like when the concentration, not the brand, is doing all the work.

Buying it and spraying it are two separate offences

Almost everything written about this online covers half of it, and the half it misses is the one that catches people first.

Using it. Regulation 8(1) of the Plant Protection Products (Sustainable Use) Regulations 2012 says no person shall use a plant protection product authorised for professional use unless they hold a specified certificate or work under supervision. Supervision is defined much more narrowly than it sounds: direct and personal, in the presence of a certificate holder, and provided for the purposes of training. All three parts have to be true. A qualified mate stood next to you who is not training you does not satisfy it.
Buying it. Regulation 9(5) says a person must not purchase, or cause another person to purchase, a professional product for use by any individual, including themselves, unless that individual holds a specified certificate. That is a separate prohibition on a separate act, and regulation 24 makes contravention of both an offence, with a fine on summary conviction or on indictment under regulation 27.
The seller is not the safeguard. HSE guidance states plainly that the distributor or seller is not required to check that the purchaser or intended user holds the appropriate certificate, and only recommends they remind customers of the obligation. So a merchant taking your money is not confirming anything about you. The duty is on the buyer, which is exactly the opposite of the way most people assume it works.
There is no exemption for your own drive. Nothing in the regulations carves out your own land, a private garden or unpaid work. The exemption people still repeat covered anyone born on or before 31 December 1964 spraying land owned or occupied by themselves or their employer, and it ceased to have effect on 25 November 2015. As HSE put it, from 26 November 2015 everyone using a professional product has had to hold a specified certificate.

To be straight about where I stand in that: I am qualified to spray professional weedkiller, so none of it costs me anything to write. It is the reason this page has no buy button on it. Some specialist merchants do state the certificate requirement in their own listings, which is more than the law asks of them, and it is a decent sign of who you are dealing with.

What the certificate actually buys you here, and it is not strength

Since the concentration is identical on both sides of the line, it is fair to ask what the professional tier is really giving you. On this label there is a genuine answer, and it has nothing to do with how hard it hits.

There is no cap on the number of treatments. Rosate's dose tables give a maximum individual dose, a maximum total dose per hectare per year and a latest time of application, and the maximum-number-of-treatments column is blank on every row. The product is controlled by how much goes on the ground in a year, not by how many times you go over it. Now compare that with the amateur bottles at the same 360 g/L: Gallup Home & Garden allows re-treatment only once per season, and the Roundup ready-to-use bottles state a maximum of one treatment a year. On an established weed problem that is the difference that actually bites, and it is a labelling difference rather than a chemical one.

The rest of it is scale and scope. Packs run from 1 to 20 litres, which is a condition of the authorisation, so there is no small bottle. A 5 litre pack at the general rate makes somewhere around 312 litres of spray, enough for roughly 12,500 square metres, which for a domestic drive is a lifetime supply of something with a shelf life. It was £34.95 plus VAT at one specialist supplier when I looked in August 2026. And the label's approved situations run to forestry, orchards, stubble, grassland and land immediately adjacent to water, none of which is a driveway.

There is a catch in that scope, though, and it cuts the other way. Read the label's hard-surface table and its stated area of use is "Around farm buildings, farm paths and farm roadways". Go through the full crops and situations list and you get wheat, barley, oilseed rape, orchards, grassland, forest, stubble, hard surfaces, natural surfaces not intended to bear vegetation and land immediately adjacent to water. There is no domestic garden entry anywhere on it. HSE's own test for using a professional product in a home or garden asks two questions, and the first is whether the conditions of authorisation will be followed. A certificate answers the second question. It does not put a suburban driveway onto a label that never mentioned one.

So the honest verdict, and it is not the one a trade counter will give you. For a drive, a path or a patio, the certificate buys you a bigger drum and a treatment count that is not capped. It does not buy a stronger kill, and it does not turn a farm label into a garden one. If you are choosing between product types rather than legal tiers, that comparison is on weed killer concentrate instead.

The label lines that actually change what you do

Most of a professional label is boilerplate. These are the lines on this one that change an outcome on the day, and several of them never appear in a retail description.

It will not finish horsetail. The label states that Rosate 360 TF does not give acceptable control of Equisetum arvense and that repeat treatment will be necessary. A manufacturer writing that about their own professional concentrate is worth more than any review, and it matches what horsetail does to everything else you throw at it.
It leaves nothing behind. There is no residual activity with Rosate 360 TF, in the label's own words, and no long-lasting activity in the soil, which is why you may cultivate seven days after treating. Whatever germinates next week germinates happily.
Six hours of dry weather, and preferably twenty-four. At least 6 hours and preferably 24 hours free of rain must follow spraying. Do not spray weeds under drought stress either, because a plant that has shut down is not carrying anything to its roots.
Medium or coarse spray, under 2.5 bar. That is a nozzle and pressure instruction, not a preference, and it is there to keep the spray off whatever is growing next to the target. Calibration is what makes any rate mean anything at all, which is the whole subject of choosing and calibrating a knapsack sprayer.
Mix it in the right order, and spray it out the same day. A third of a tank of clean water first, then the measured product, agitate, then top up. The label is blunt about storage too: never mix, apply or store it in galvanised or unlined mild steel containers.
On hard surfaces, spray the weed and not the ground. The label confines treatment to visible weeds, including those in the 30 cm strip covering the kerb edge and road gully, and tells you not to overspray drains and not to spray hedge bottoms. March to October, and never under glass or polythene.
Coveralls, gloves and rubber boots. That is what the label asks for with a hand-held sprayer, in those words. Every retail page I looked at that sells this product to a member of the public leaves the protective equipment out entirely, which tells you what those pages are for.

One more, for anyone comparing hazard labels. Rosate carries the environmental pictogram and H411, toxic to aquatic life with long lasting effects, and no health signal word at all. Several "natural" amateur concentrates on a garden centre shelf carry a Warning and an eye-irritation statement instead. Neither fact makes either product safe or unsafe on its own, but it is a useful corrective to the idea that the professional bottle must be the frightening one.

The amateur-legal way to buy the same thing

Rosate 360 is a professional product and needs a certificate. This is the same 360 g/L glyphosate on a label you are actually allowed to use in your own garden.

What I’d use

Glyphosate concentrate, 360 g/L

Gallup Home & Garden Glyphosate Weedkiller (1 litre)

The one Gallup a homeowner can legally buy and use: a 1 litre glyphosate concentrate at 360 g/L, approved for home and garden use under MAPP 17672.

It is the same active, the same 360 g/L loading and the same isopropylamine salt as the professional Gallup XL, and its single label rate of 24 ml per litre of water is exactly the rate the professional labels reserve for perennial broad-leaved weeds. The difference between the two bottles is the authorisation printed on them, not the chemistry inside, and this is the side of that line you are allowed to stand on.

Active ingredient: Glyphosate, 360 g/L, as the isopropylamine salt
Formulation: Soluble concentrate you dilute yourself
Approval: MAPP 17672, labelled for use only as a home and garden weedkiller
Mixing rate: 24 ml per 1 litre of water, per the label
Coverage: 40 sq m per litre of made-up spray, so roughly 1,667 sq m per bottle
Rainfast: Rain within 6 hours may reduce effectiveness, per the label
Size: 1 litre of concentrate

Watch out for

No measuring cap in the bottle. Check a cup arrives, or the dose is guesswork.
One re-treatment a season, and it takes four weeks. Do not go again early.
Not for lawns. It is non-selective and takes the grass too.
Resellers dominate the listing, so check the label that arrives is Barclay.
"Super strength" is keyword stacking. It is 360 g/L, same as professional Gallup XL.

Check the price on Amazon

That’s an affiliate link: buy through it and I earn a small commission at no extra cost to you. It doesn’t change what I recommend or what I say is wrong with it. More on how that works in the affiliate disclosure.

No brand pays for a mention here, and nothing on this page is a paid-for opinion. The card above is an affiliate link, so I earn a commission if you buy through it, at no extra cost to you. It buys no product a kinder write-up, which is why the watch-outs sit on the same card as the reasons to buy.

About this resource

I'm The Weed Guy, one bloke who is qualified to spray professional weedkiller. Every rate, ratio, concentration, MAPP number and restriction on this page was read off two sources anyone can check: the approved Rosate 360 TF product label and safety data sheet, and the HSE professional pesticides register, which is public and searchable. The legal wording is quoted from the Plant Protection Products (Sustainable Use) Regulations 2012 and HSE's own guidance on them, not paraphrased from a forum.

Where I could not verify something, it is not here and I have said so. I could not establish what the letters TF stand for, so the page says that rather than repeating the plausible guess. I could not establish the use-up deadline that applied to Rosate Green stock after its withdrawal, so no deadline is stated. And I have not run this product against any other in a test, so nothing here is a performance verdict between brands.

One inconsistency worth flagging, because it shows why the label beats the marketing. Albaugh's own website describes Rosate 360 TF as a suspension concentrate. The approved label, the HSE register and the authorisation notice all say soluble concentrate. When a manufacturer's web page disagrees with its own approved label, the label is the document with legal force behind it.

The commercial position, plainly: nothing here is a paid-for opinion and no brand sponsors this site. There is no product card on this page and that is deliberate rather than an oversight. Rosate is a product I do not think most of the people searching for it should be buying, so putting a buy button under that argument would make the argument worthless. The full position on how this site earns anything at all is on the affiliate disclosure page.

Common questions

How much Rosate 360 do I put in a litre of water?

Sixteen millilitres for general use, or twenty-four where perennial broad-leaved weeds are present. Those two figures come off the label's own Knapsack Rate Estimator, which converts the boom rates of 4.0 and 6.0 litres per hectare in 250 litres of water into something you can measure into a sprayer. Scaled up, a 5 litre pressure sprayer takes 80 ml at the general rate and 120 ml at the higher one; a 15 litre knapsack takes 240 ml and 360 ml. Either way a litre of the made-up spray is meant to cover about 40 square metres, because the stronger rate is for a harder weed rather than more ground.

What is the dilution ratio for Rosate 360 TF?

Roughly 1 part product to 62 parts water for general use, and 1 to 41 where perennial broad-leaved weeds are in the mix. Nobody prints it that way, so here is the working: the label gives 16 ml of product per litre of water, and 1,000 divided by 16 is 62.5. The higher rate is 24 ml per litre, and 1,000 divided by 24 is about 41.7. If you have seen Rosate quoted at a vaguer 20 to 25 ml per litre, that is a bracket somebody has drawn around two exact label figures rather than a rate in its own right.

Can I buy Rosate 360 TF if I am not qualified?

A merchant will sell it to you and you would be committing an offence by buying it, which is the part most often got wrong. Regulation 9(5) of the Plant Protection Products (Sustainable Use) Regulations 2012 says a person must not purchase a professional product for use by any individual, including themselves, unless that individual holds a specified certificate. The duty sits on you, not on the till, and HSE guidance says in as many words that the seller is not required to check. Using it is then a second, separate offence under regulation 8(1). Both are criminal offences under regulation 24.

What is the amateur equivalent of Rosate 360 TF?

Any 360 g/L glyphosate concentrate on the HSE amateur register, and the closest match is Gallup Home & Garden, MAPP 17672. It is the same active at the same concentration, and its single label rate of 24 ml per litre of water is exactly the rate Rosate reserves for its harder job. Roundup Ultra, MAPP 18850, is also amateur and also 360 g/L. So the substitution is not a step down: 360 g/L is the top of the amateur liquid ladder in Great Britain as well as the standard professional amenity strength, and you can buy it without a certificate or a conversation.

Is Rosate stronger than Roundup?

No, and on the number that matters they are the same. Rosate 360 TF is 360 g/L glyphosate. So is Roundup ProActive, the professional amenity product, and so is Roundup Ultra, which is amateur and sits on a garden centre shelf. Where the Roundup name gets confusing is at the other end: it also covers ready-to-use trigger bottles at 7.2 g/L and glyphosate-free bottles that contain no glyphosate at all. Rosate has never had that problem, because every Rosate ever registered here has been a straight 360 g/L professional concentrate.

What does the TF in Rosate 360 TF stand for?

The only answer anywhere online is a gardening forum reply saying it means tallow free, and I could not confirm that from any document with authority behind it. The letters are not expanded on the label, in the safety data sheet, in the HSE authorisation notice or on Albaugh's own product page. What I can tell you is what the safety data sheet actually lists: an isopropylamine salt of glyphosate with ethoxylated C8-C10 alcohols and an alkyl ether phosphate as the co-formulants, and no POE-tallowamine. The EU excluded POE-tallowamine from every glyphosate product in a regulation of 1 August 2016. Those facts sit next to each other suggestively, and suggestive is not the same as sourced, so I am leaving it there.

Some sites say 20 ml per litre and one says 35. Which is right?

Neither is the label figure, and the reason they disagree is more useful than the argument. The label gives 16 ml per litre for general use and 24 where perennial broad-leaved weeds are present, both worked out on an assumed spray volume of 250 litres of water per hectare. Millilitres per litre depends entirely on that assumption, because a pesticide is dosed per unit of ground rather than per unit of water. The figure to hold on to is the ceiling: 6 litres per hectare is the maximum individual dose for hard surfaces, which is 24 ml per litre at the label's own water volume. At normal knapsack coverage, 35 ml per litre puts you over it.

How much ground does 5 litres of Rosate cover?

Around 12,500 square metres at the general rate, and about 8,300 at the higher one. The working is off the label rather than off a listing: 5,000 ml divided by 16 ml per litre gives roughly 312 litres of made-up spray, and 312 litres at 40 square metres each is about 12,500 square metres. At 24 ml per litre you get about 208 litres of spray and roughly 8,300 square metres. For a domestic drive of forty square metres that is an absurd quantity, which is worth sitting with before you decide the professional pack is the sensible buy.

How long does Rosate need before it rains?

At least six hours, and the label asks for twenty-four if you can get it. The exact wording is that a period of at least 6 hours and preferably 24 hours free of rain must follow spraying. Six is the floor, not the target. The same section says not to spray weeds suffering from drought stress either, because a plant that has shut down is not moving anything anywhere, and glyphosate only works by being carried down into the root.

Will Rosate kill horsetail or mare's tail?

No, and Albaugh say so on their own label: Rosate 360 TF does not give acceptable control of horsetail, Equisetum arvense, and repeat treatment will be necessary. That is a manufacturer telling you their professional concentrate will not finish a weed, which is worth more than any review. It also matches what the Gallup label says about the same plant. Horsetail is a different problem needing a different approach, not a stronger mix of the same thing.

Does Rosate stop weeds coming back?

No. Its own label states that there is no residual activity with Rosate 360 TF and that it has no long-lasting herbicidal activity in the soil, which is why the label lets you cultivate seven days after treatment. That is a property of glyphosate rather than a shortcoming of this product. It kills what is growing today, down to the root, and does nothing whatever about the next seed that blows onto your drive. If you want ground to stay bare you need a residual product, which is a different chemistry doing a different job.

Why does the HSE register say Rosate 360 TF expires in 2099?

Because 09/09/2099 is a placeholder, not a date. HSE's own explanatory note says that where an expiry of 09/09/2099 is shown, an extension of authorisation under Article 43 has been applied, and the authorisation will be withdrawn once a regulatory decision has been taken. In plain terms the product is running on an extension while a renewal decision is pending, and the real end date is unknown rather than seventy-odd years away. The amendment notice adds that on expiry there may be a grace period of up to six months for sale and a further twelve months for use of existing stocks.

Is Rosate Green still available?

Not as an authorised product. Rosate Green held MAPP 15122 and took a commercial withdrawal notice in April 2025 with an authorisation expiry of 30 June 2025. Rosate 36 and Rosate 36 SL both expired back on 30 June 2018. Rosate 360 TF is the only Rosate left on the Great Britain register. If you have an older Rosate drum in a shed, what you are holding is a product whose authorisation has ended, and I could not establish the exact use-up deadline that applied to it, so treat that as a question for the manufacturer rather than something to work out yourself.

Do I need a licence to spray Rosate on my own driveway?

Yes, and there is no domestic exemption to fall back on. Regulation 8(1) says no person shall use a plant protection product authorised for professional use unless they hold a specified certificate or work under supervision, and supervision is narrowly defined: direct and personal, in the presence of a certificate holder, and provided for the purposes of training. Nothing in the regulations carves out your own land, your own garden or unpaid work. The exemption people still cite covered anyone born on or before 31 December 1964 spraying their own or their employer's land, and it ceased on 25 November 2015.