Ragwort: Why This Year's Bumper Crop Is a Real Danger to Your Horses

If you've walked your fields recently, you'll have noticed it — bright yellow flowers popping up everywhere, seemingly more than ever. Ragwort has had a spectacular year, and whilst it might look cheerful dotted across the countryside, it's one of the most dangerous plants your horse can encounter.

Why Has Ragwort Flourished This Year?

Ragwort thrives on disturbed, overgrazed and poor-quality land, and this year's conditions have been close to perfect for it. Drought-stressed pastures mean grass cover is thinner and patchier than usual, leaving bare ground exactly where ragwort seeds love to establish. As grazing becomes scarcer, horses are also more likely to be turned out on paddocks that would ordinarily be rested, increasing the overlap between hungry horses and ragwort-infested land.

This creates a genuinely dangerous combination. In a normal year, a well-grazed field with plenty of grass gives horses little reason to touch ragwort, which is bitter and unpalatable when fresh. But when grazing is in short supply, horses become far less fussy. They may eat ragwort simply because there's little else available — and this is when poisoning cases spike.

Why It's Dangerous — and Why "Leave It Alone" Advice Is Wrong

There's a persistent myth doing the rounds, particularly on social media, that ragwort is a valuable wildflower that should be left to grow because it supports pollinators such as the cinnabar moth. Whilst it's true that ragwort does support certain insect species, this doesn't make it safe to leave in or near grazing land, and this advice is actively putting horses at risk.

Ragwort contains pyrrolizidine alkaloids, which cause cumulative, irreversible liver damage. The danger isn't a one-off nibble — it's the accumulation over time. Crucially:

• Dried ragwort is more dangerous, not less. When ragwort is cut, wilted or dried (including in hay), it loses its bitter taste but keeps its toxicity, meaning horses will often eat it far more readily once it's no longer growing.

• There's no antidote. By the time symptoms appear — weight loss, lethargy, jaundice, photosensitisation, neurological signs — significant and often fatal liver damage has usually already occurred.

• It's a legal matter, not just a welfare one. Ragwort is classed as an injurious weed under the Weeds Act 1959, and the Ragwort Control Act 2003 places a responsibility on landowners to prevent its spread, particularly near grazing land and areas used for forage production.

The "leave it for the pollinators" argument overlooks the fact that ragwort is a fast-spreading, prolific seed producer — a single plant can produce tens of thousands of seeds — and it will readily colonise neighbouring land, verges and hay fields if left unchecked. Responsible control isn't about eradicating every ragwort plant from the countryside; it's about removing it from anywhere horses graze, exercise or where hay is cut.

Tips for Managing Ragwort on Your Yard

1. Walk your fields regularly, not just once a season Ragwort's growth stages change how easy it is to spot and pull. In a year like this, check weekly rather than monthly, especially on drought-thinned paddocks.

2. Pull before it flowers where possible Once ragwort sets seed, you're managing next year's problem too. A ragwort fork (or a sturdy pair of gloves and a firm pull, root and all) is usually enough for young plants, minimising root breakage that allows regrowth.

3. Never leave pulled ragwort in or near the field This is where good intentions often go wrong. Pulled ragwort left on the ground will wilt, become more palatable and is just as toxic. Remove it immediately to a covered, horse-inaccessible area and dispose of it — burning is a commonly used method, subject to local regulations, or it can go to licensed green waste disposal. It should never go on a muck heap that horses have any access to, or be composted for future use on grazing land.

4. Manage the land, not just the plant Ragwort exploits bare, overgrazed ground. Where drought has thinned your pasture, consider resting affected paddocks, overseeding once conditions allow, and avoiding overstocking — particularly this year, when the temptation is to squeeze more grazing out of less grass.

5. Check hay and haylage carefully Since dried ragwort is more palatable and just as toxic, it's worth inspecting hay closely, particularly if it's come from land you don't manage yourself, or from fields cut later in a dry summer when ragwort may have been more established.

6. Don't rely on horses to avoid it themselves Whilst horses will usually avoid fresh ragwort if given the choice, drought conditions remove that choice. Don't assume good grazing management from previous years still applies when pasture is under pressure.

7. Get your yard involved Ragwort control works best as a team effort. Make it part of your yard's routine checks, and encourage liveries to report any sightings rather than assuming someone else will deal with it.

The Bottom Line

This year's conditions have given ragwort exactly the environment it needs to spread, at precisely the time when horses are most likely to eat it. Don't be swayed by online advice suggesting it should be left for wildlife — on grazing land, the risk to your horses far outweighs any ecological benefit, and the law is clear on your responsibility to control it. A bit of vigilance now, whilst plants are still establishing, will save considerably more work — and risk — later in the season.

Spotted ragwort on your yard? Don't wait for it to flower — get it out, dispose of it properly, and keep checking. Your horses' livers will thank you.