How to get rid of ivy

The chemical isn’t the problem here, the delivery is. Glyphosate is systemic: it has to be taken in through green tissue and carried down to the root before it does anything at all, and a mature ivy leaf is built to shed water. Sprayed at an established wall of it, most of what you put on runs off. The same bottle, the same active, painted onto a stem you have just cut, goes straight past the leaf and into the plant. So “will glyphosate kill ivy” has two honest answers depending on how you use it: sprayed over mature leaf, usually not; delivered through a fresh cut, yes.

That changes what is worth buying, and the numbers on the pack make the point better than I can. A ready-to-use trigger bottle is made for wetting soft growth, and it is dilute by design: Roundup Fast Action ready to use carries 7.2 grams of glyphosate per litre (MAPP 18679) and Resolva Weedkiller 24H 8.39 grams (MAPP 18921). An amateur concentrate you dilute yourself is a different animal, and Roundup Ultra is 360 grams of glyphosate acid per litre (MAPP 18850), fifty times the strength in the trigger bottle before a drop of water goes near it. If ivy is the job, the concentrate is the buy, and the mixing arithmetic is worked through separately because getting the dilution wrong is the most common way people waste a bottle.

One thing I would rather flag than gloss over: the amateur glyphosate labels I have read give rates for spraying an area, not an instruction for painting a cut surface, so read what the bottle in your hand actually authorises before you use it that way. What the forestry guidance is clear about, and it holds whatever you paint on, is speed and placement. Many woody plants seal off their vascular tissue soon after they are cut, so a water-based treatment wants to be on within about five minutes, and the part that matters is the outer ring of the cut just inside the bark. That is the tissue carrying anything down to the roots. The middle of the stump is dead wood and does nothing with it.

The other half of the answer is triclopyr, and it is worth knowing which job it is for. SBK Brushwood Killer is a home-garden approved concentrate carrying 48 grams of triclopyr per litre (MAPP 12711), and unlike glyphosate it takes broadleaved and woody growth out while leaving grass standing. Its label also carries an explicit cut-surface instruction, equal volumes of product and water painted over all surfaces of a cut stump down to soil level, and the HSE approval lists stumps among its authorised areas. Be straight about the limit though: the pack names brambles, nettles, dock, tough weeds, woody weeds and hardwood saplings, and ivy is not on that list. Where it earns its place is ivy running through rough grass, a hedge bottom or a bank you want to keep green. On a wall or a fence panel there is nothing green to spare, so the selectivity buys you nothing and glyphosate costs less. How a synthetic auxin actually works, and what that label does and doesn’t authorise, is set out on its own page.

No, not in any way that finishes the job. Household vinegar is an acetic-acid contact treatment: it burns and desiccates the leaf tissue it directly touches, but it doesn’t move down into the root system the way a systemic weedkiller does. University extension research on vinegar as a weedkiller is consistent that it can work on very young seedling growth at high concentrations, but a mature, established perennial climber with an extensive root network is exactly the profile it fails against: the top might wilt and discolour, then regrow within a week or two because the roots were never touched.

It also won’t save you the actual work. Even a successful vinegar scorch still leaves dead-looking leaf on the wall or fence, which you then have to strip off by hand anyway, so at best it’s a cosmetic head start on a job you were always going to do yourself.

This one has a real legal answer behind it. English law has long recognised that a landowner can cut back branches and roots that encroach from a neighbour’s property, back to the boundary line, without asking permission first and without giving notice. The principle goes back to a House of Lords case, Lemmon v Webb, and it treats an encroaching plant as a nuisance you’re entitled to abate yourself, covering roots as well as growth above ground.

The limit matters just as much as the right: you can only cut back to your side of the boundary. Reaching over the line, or going onto their property to do the work, is trespass, however annoying their ivy is. Strictly, the cuttings remain your neighbour’s property, so the tidy approach is to offer them back rather than just bin them. None of this is legal advice, only the general shape of a long-established legal principle.

If any of the "dangers" framing around ivy has you worried it’s something more serious, it isn’t. Japanese knotweed sits on Schedule 9 of the Wildlife and Countryside Act 1981 as a non-native invasive species, with real legal weight attached: mortgage-form questions, disposal rules, the lot. Ivy (Hedera helix) is a UK native plant and carries none of that. If you’re not sure which one is actually on your wall, here’s how to tell Japanese knotweed apart from its lookalikes.