The law on ragwort is the Weeds Act 1959. This is a piece of legislation that mentions the control of ragwort. A rare legal order may be made forcing someone to control ragwort, but in the absence of this legal order there is no requirement to do anything.
It is important for landowners and other people to understand that they have no automatic legal obligations to treat and remove ragwort from their land. It is simply the case that there is nothing in the legislation that says that you automatically must eliminate ragwort from land. It is similar to legislation that creates orders for traffic such as yellow lines. It is not automatic but only happens where there is a problem.
This is what the Act says:
"(1) Where the Minister of Agriculture Fisheries and Food (in this Act referred to as 'the Minister') is satisfied that there are injurious weeds to which this Act applies growing upon any land he may serve upon the occupier of the land a notice, to take such action as may be necessary to prevent the weeds from spreading.
(2) This Act applies to the following injurious weeds, that is to say -
Spear thistle
Creeping or field thistle
Broad leaved dock
Curled dock
Ragwort"
It is commonly claimed that this legislation forces landowners to control ragwort or that it places an obligation on them to do so. As can clearly be seen from the actual contents and text of the Act this is not the case. It is not unknown for even such august bodies as local councils to get this matter wrong. This is the text of the Act and this is what it says. The rest of this rather short Act of Parliament is about procedure and powers but has no bearing on the legal obligations and requirements placed on landowners in general. For completeness a copy is available here: The Weeds Act 1959.
The Weeds Act has been subsequently amended by the Ragwort Control Act 2003 but this has no real effect on the legal information given on this page since it only provides for some guidance to be created.
It is commonly claimed that the Weeds Act 1959 forces landowners to control ragwort or places an automatic legal obligation on them to do so. This claim is false. As the text of the Act quoted above makes clear, the law itself only starts doing anything when One of these very rare legal orde4rs is issued to cover ragwort on that specific land. There is no automatic obligation. There is no general duty to control the plant. In the absence of a formal notice there is nothing in the law that requires anyone to do anything about ragwort.
The mechanism is similar to the kind of legal orders used in creating a parking restriction. A yellow line on a road only applies where it has been formally laid down and signed off in law. You cannot be penalised for parking on a road simply because yellow lines exist somewhere else in a completely different place. In the same way, the existence of the Weeds Act does not place any obligation on any landowner at all unless and until a specific notice has been served on them personally in respect of their specific land.
It is also important to understand properly that there is a threshold that must be met before any notice of this kind can be served. The law says that the Minister must be satisfied that injurious weeds are growing on the land and that there is a risk of them spreading. The legislation, framed originally in the 1920s, is concerned with agricultural spread onto neighbouring land. It is clearly not a mechanism for compelling landowners to remove ragwort for reasons of animal welfare or any other purpose not written into the Act. Those considerations simply do not appear anywhere in the Act.
Local councils, landowners' organisations, and equestrian bodies have on occasion misrepresented the legal position, sometimes claiming that the Act imposes duties that it does not. Examples of local councils getting this wrong are documented elsewhere on this site. The text of the Act is short and unambiguous. It says what it says and no more.
The British Horse Society are quite notorious for their misinformation about ragwort as documented elsewhere on this website, and their misstatement of the law is just one example. At the time of writing (June 2026), the British Horse Society states on its website that if ragwort is growing within 50 metres of land used by horses:
"the landowner must take immediate action to remove the weed."
This statement misrepresents the law. As the text of the Weeds Act 1959 quoted above makes clear, no such automatic duty exists. A legal obligation under the Act only arises when a formal notice has been served by the relevant authority on the occupier of a specific area of land. The 50 metre figure does not appear in the Weeds Act or the Ragwort Control Act 2003. It derives from a Code of Practice which is explicitly not law and creates no legal obligations. Horse welfare is not mentioned anywhere in the Weeds Act 1959 as a consideration. The BHS statement is not a description of the law as it stands.
The arbitrary nature of that 50 metre figure is further demonstrated by the fact that the equivalent Welsh Government guidance uses 35 metres. If either distance were actually derived from the text of the law then both nations would have to use the same figure. The difference between them confirms that these are administrative guidance figures which have no basis in statute law at all and create no legal obligations whatsoever. The Welsh figure was reduced as a result of a response to a consultation from the owner of this website and more closely reflects the known distribution of seeds. Even so it still considerably exaggerates the risk.
Again at the time of writing, the British Horse Society provides a template letter for members to send to neighbouring landowners stating that they are "obliged to control the ragwort." This statement is unequivocally false and contradicted by the actu8al text of the law itself No such obligation exists in the absence of a formal notice served under the Act. A neighbour receiving such a letter would have no legal obligation to respond to it or to take any action whatsoever. The letter does not represent the law as it stands and should not be treated as though it does.
One could quite imagine that if such a letter were sent as part of a long multi-faceted dispute between quarrelling neighbours that eventually ended up in a court case, a judge might not look favourably on a litigant who had used letters which misstate the law.
The word "injurious" used in the Weeds Act 1959 is not ordinary everyday language and this is important. As a legal term it does not mean "causes injury." It is what is known as a legal term of art. It is a word or phrase that has developed a specific legal meaning which may differ from the dictionary definition or the more colloquial use of the word. As a result the word has a precise and well-established meaning. It is a rather uncommonly used word in any case.
This is a term that has its roots in centuries of usage and legal tradition. In the article on this website linked to above, which gives full details of the meaning of the word there is even a reference to the Latin word from which it is derived being used by Roman orator and legal expert Cicero in one of his books written in 44BC! The evidence makes clear that "injurious" means economically damaging or causing harm to some kind of commercial or agricultural interest. In the context of the Weeds Act it clearly means harm caused by spreading onto productive land and competing with crops or pasture. It has nothing to do with causing injury or risk of poisoning.
It is absolutely clear that this is not a matter of interpretation. A systematic survey of Hansard, the official record of parliamentary debates, covering more than two thousand documented examples of the words "injurious" and "injuriously" from 1803 to 2004, shows this meaning to be entirely consistent throughout all of the debates and statements examined. The word is used in contexts of economic damage to trade, commerce, agriculture, and property. It is never used as another way of saying toxic or poisonous.
When parliament debated injurious weeds specifically the context makes this even clearer. In debates around the development of the term "injurious weeds" there is this comment from Lord Bledisloe:
"May I also remind your Lordships that there are several
Acts now being administered by the Ministry of Agriculture —
notably, the Injurious Insects and Pests Act — under which it
is possible for the Ministry to make lists of pests which are
injuring agriculture and which ought to be dealt with in a
similar manner to noxious weeds?"
— Lord Bledisloe, House of Lords, 26 July 1921
In 1938, during debate in the House of Lords, Hansard records the following from the Parliamentary Secretary to the Ministry of Agriculture and Fisheries:
"Further, similar provisions to those which are included
in this clause appear in the Corn Production Acts (Repeal) Act,
1921, which your Lordships might call legislation dealing with
injurious weeds; and a similar provision is contained in the
Rats and Mice (Destruction) Act, 1919."
— The Earl of Feversham, House of Lords, 8 November 1938
As can be seen, this explicitly placed legislation dealing with injurious weeds into the same category as the Rats and Mice (Destruction) Act 1919 — pest control legislation concerned with agricultural and economic damage. There is no connection here with anything toxic. The concern is with animals and insects that damage agriculture, not with toxicity in plants.
The full detailed evidence from parliamentary debates is available in the index of parliamentary usage of "injurious" by year. It demonstrates beyond reasonable doubt that "injurious weeds" in the Weeds Act 1959 means weeds that cause agricultural and economic damage by spreading.
Some guidance documents and websites substitute the phrase "harmful weeds" for the statutory term "injurious weeds." This substitution does not help public understanding. "Harmful" in normal everyday English most naturally suggests danger to health, and the effect of using it in this way is to mislead readers into thinking the law is primarily concerned with toxicity. This is not the case. For a fuller explanation of why this substitution misrepresents the law, see why "harmful weeds" misrepresents the law.
The Weeds Act 1959 itself is a short piece of legislation and its history is important in this context. It is what is known as a consolidation Act, which means that unlike most Acts of Parliament it was never actually debated at all. It simply repeated provisions already present in earlier agricultural legislation. This is explained further at this link: Corn Production Acts as amended by the Agriculture Act 1920.
The context of that 1920s legislation was clear. It gave landlords the ability to require their tenants to keep their land in good agricultural order. There was no concern for public safety or the health of animals. It was entirely concerned with agricultural productivity and the tidiness of farmland in the wake of the First World War. A tenant who allowed weeds to spread onto neighbouring land could be compelled to deal with them — not because the weeds were dangerous in any way, but because they posed a risk to and were economically damaging to agriculture.
Conservationists have been highly critical of the Weeds Act because, since it repeats attitudes and law from the age of pre-mechanised agriculture, it fits badly with modern biodiversity policy. Ragwort is in fact a spectacularly important wildlife plant, supporting over seventy species of insect. The Act fails completely to reflect current scientific understanding of the ecological value of native wildflowers.
A persistent myth claims that ragwort is a "notifiable weed" that must be reported to the authorities when it is found growing. This is entirely false. There is no such legal category as a notifiable weed in English, Welsh, or Scottish law. The term has no basis in the Weeds Act 1959, the Ragwort Control Act 2003, or any other legislation. It appears to have originated from confusion with other regulatory frameworks such as notifiable animal diseases, where genuine reporting obligations do exist, and has been repeated so often that many people now believe it to be true.
The legal position is straightforward. The Weeds Act 1959 is the only legislation that can place any obligation on a landowner in relation to ragwort. As shown above, it creates no automatic duty of any kind and says nothing whatsoever about notification or reporting. There is no requirement in law to notify, inform, or tell anyone of the occurrence of ragwort anywhere.
This is not a matter of legal opinion. A government minister confirmed the position directly in a parliamentary answer. The full details of that answer and a thorough explanation of why this myth is false are available in the article ragwort and the notifiable weed myth.
There is a significant legal matter surrounding ragwort that is almost always absent from the guidance produced by ragwort's detractors. While the Weeds Act 1959 provides a legal mechanism for controlling the spread of ragwort in certain specific circumstances, a completely separate piece of legislation places restrictions on what anyone can actually do about it.
The Wildlife and Countryside Act 1981 makes it a criminal offence to uproot any wild plant without the permission of the landowner or occupier. Ragwort is of course a wild plant. This means that anyone who goes onto land and pulls up ragwort without the permission of the person who owns or occupies that land is committing a criminal offence. This applies regardless of whether the ragwort is within 50 metres of a horse.
The implication is significant. People who believe, incorrectly, that they have a right to demand that their neighbour removes ragwort do not have any right to remove it themselves if the neighbour declines. To do so would be to commit a criminal offence. The full details of what this legislation says and its implications for ragwort are explained in the article ragwort and the Wildlife and Countryside Act.