How to get rid of brambles
Brambles spread three different ways at once, which is why cutting them back sometimes helps and sometimes backfires. Here's how they actually work, whether SBK Brushwood Killer is worth it over a straight glyphosate, what to do about a neighbour's brambles coming over your fence, and the thorn safety question worth taking seriously.
The short version
Brambles spread three ways at once, rooting canes, seed, and regrowing from root fragments, which is why they keep coming back even after a hard afternoon with loppers. Cutting is a legitimate first step, but cutting too close to the ground can trigger more shoots rather than fewer. The combination that actually finishes the job is cutting the canes down, digging out or treating the crown, either with glyphosate on a fresh cut or a triclopyr product like SBK Brushwood Killer if there’s grass around it you want to keep.
What actually gets rid of brambles, and what just wastes an afternoon
Same test as every weed on this site: does it reach the crown and roots, or does it just deal with the canes on top?
| Method | Kills it? | What actually happens |
|---|---|---|
| Pulling live canes by hand | No, and it’s a good way to get hurt | The thorns tear skin, and most canes just snap off at ground level, leaving the crown and roots exactly where they were. |
| Cutting to about 30cm and digging out the crown | Yes, for that plant | This is the RHS’s own method: it removes the woody crown the canes grow from, so there’s nothing left to resprout. |
| Mowing or cutting hard, repeatedly, right at ground level | Can backfire | Cutting too close to the ground can trigger the plant to throw up more shoots from the root, not fewer. |
| Glyphosate sprayed on the leaves in summer | Yes, with repeat treatment | A genuine systemic option while the plant is actively growing, though rarely a one-spray job on anything established. |
| Glyphosate painted onto the fresh-cut stem | Yes, more reliably | Treating the fresh cut within about half an hour draws the herbicide straight in before the plant can seal the wound over. |
| Spraying in deep winter | Rarely | The plant’s system is largely shut down over winter, so a systemic treatment has little chance of reaching the root. |
| SBK Brushwood Killer | Yes, and safe on the grass around it | A genuinely different mechanism to glyphosate, one that targets woody growth like brambles without killing the lawn or verge it’s growing through. |
| Leaving cut canes on a home compost heap | Not a kill method, and a mistake | Not a control method at all. An unshredded cane or root fragment left near soil can root again and start the problem over. |
Why brambles keep coming back: three ways to spread, not one
Unlike horsetail, which is really a story about roots going deep, or bindweed, which is really a story about any fragment regrowing, brambles spread three separate ways at once, and that combination is exactly why they're so persistent.
- Tip layering. A long arching cane bends over, its tip roots wherever it touches the ground, and a brand new, independently rooted plant appears, without any seed or existing root spreading at all. This is the main way a single plant turns into a thicket.
- Seed. A mature plant can produce tens of thousands of seeds, spread by birds, and the seed often doesn’t germinate until the second year, so new plants can appear well after you thought a patch was dealt with.
- Root and stem fragments. Chop through roots while digging, or leave stem cuttings lying on soil, and pieces can regenerate into new plants on their own.
Does cutting brambles back help, or make it worse?
Both, depending how it's done, and this is more nuanced than most advice admits. Cutting stems back to around 30cm is genuinely the RHS's own recommended first step, it clears growth so you can get at the crown to dig it out, or so fresh regrowth is easier to treat. Cutting is not the trap that digging bindweed is.
The real nuance: cutting stems at or very near ground level can stimulate suckering, pushing the plant to throw up more shoots from the root rather than weakening it. Repeated close mowing as a strategy on its own risks feeding that response rather than starving it. Cut to leave a short stem, don't scalp it flush with the soil, and follow up with digging out the crown or treating the regrowth rather than assuming cutting alone will finish it.
Brambles on a fence line or driveway edge
This is where brambles behave differently to a bed weed. An arching cane from a neglected patch next door can root itself over or through a fence and start a brand new plant on your side, entirely independent of whatever's happening to the parent plant, similar in spirit to bindweed climbing through a fence gap, but rooting a whole new plant rather than just growing through.
Along a driveway or path edge, a cane that roots into a gap or joint can be genuinely awkward to dig out without disturbing the surface around it. In that situation, treating the regrowth rather than trying to excavate a crown wedged against paving is usually the more realistic approach.
SBK Brushwood Killer: what's actually in the bottle
SBK's active ingredient is triclopyr, at 48g/L, and it's approved specifically for brambles, ivy, tough woody weeds and tree stumps, labelled safe for use on grass, lawns, paddocks and pasture. That grass-safety is a genuine, sourced reason to reach for it rather than glyphosate, backed by the product's own label rather than a marketing claim.
The mechanism is real and different: triclopyr is a synthetic version of a plant growth hormone, and it works by overloading a woody plant's own growth-regulation system rather than blocking the enzyme glyphosate targets. Grasses respond to that hormone pathway differently to broadleaf, woody plants like brambles, which is the actual reason it can be used on a lawn or paddock edge where glyphosate would kill the grass along with everything else.
It's a professional product in the sense that using it as part of paid work legally requires a recognised certificate of competence, the same requirement as any professional-use herbicide. Always check the specific pack's own printed mixing rate rather than a figure quoted anywhere else, including here.
What I'd actually buy
Triclopyr concentrate, 48 g/L
SBK Brushwood Killer
A woody-weed herbicide labelled safe for use on grass, lawns and paddocks.
The right choice when brambles are growing through or right alongside grass you want to keep, since its mechanism targets woody growth without touching the lawn.
Systemic weedkiller
A proper glyphosate concentrate
The reference point for open ground with no grass to protect.
Cheaper per litre than SBK for the same underlying job when there’s nothing nearby you need to spare. See mixing rates on named products for the detail.
Safety kit, not a chemical
Heavy-duty gauntlet gloves
Proper thorn-proof gauntlets, not thin gardening gloves.
Given the tetanus risk from a dirty puncture wound, this is the one item on this list that’s worth not skimping on.
No affiliate links on this page, and no brand pays for a mention here. These are named for what they actually are and do, not a claim that one outperforms another in a test.
Thorns, tetanus and disposal
A bramble scratch is rarely serious on its own, but the puncture can seal over quickly and trap in soil-borne bacteria, and garden soil is a genuine source of tetanus exposure. If your tetanus vaccination isn't current and you've had a dirty puncture wound, it's worth getting checked rather than assuming it's fine. Heavy gloves are the simple precaution.
On disposal, don't put cuttings or roots on a home compost heap. Because fragments can regenerate, an unshredded cane or root left touching soil can simply start again. Shred or chop canes small before council green waste collection, and handle any dug-out roots separately.
About this resource
I’m The Weed Guy, one bloke who’s qualified to use professional weedkiller. This resource is built around the boundary and hard-surface case most bramble advice skips, along with an honest look at whether SBK Brushwood Killer earns its reputation or is just a stronger-sounding bottle.
Straight disclosure: nothing here is a paid-for opinion, no brand sponsors this site, and there are currently no affiliate links on this page. If that ever changes it will be disclosed plainly, right here.
Common questions
Will brambles grow back if you cut them?
Usually, yes, unless you also remove the crown or follow up with treatment. Cutting is a legitimate first step, it clears growth so you can get at the crown or treat fresh regrowth, but cutting too close to the ground on its own can actually trigger the plant to send up more shoots rather than fewer.
How deep do bramble roots actually go?
The main crown usually sits fairly shallow, roughly 15 to 30cm down, but root suckers can emerge from roots as deep as around 45cm. That’s shallower than horsetail’s two-metre roots or bindweed’s root network, but brambles make up for it with three separate ways to spread: rooting canes, seed, and regrowing from root fragments, so shallow doesn’t mean easy.
What is the best time of year to kill brambles?
Autumn tends to work best for a systemic spray, because the plant is drawing sugars down into the root for winter and pulls the herbicide down with them. Avoid deep winter, when the plant’s system has largely shut down and a systemic treatment has little chance of reaching the root at all.
Does glyphosate kill brambles permanently?
With the right method and timing, yes, though rarely in one go. Spraying leaves works while the plant is actively growing, but painting concentrated glyphosate onto a freshly cut stem, within about half an hour of cutting, is the more reliable professional method, since it goes straight into the plant rather than relying on leaf absorption.
Is SBK Brushwood Killer better than a straight glyphosate?
Not stronger, genuinely different. Its active ingredient, triclopyr, works by overloading the plant’s own growth hormones rather than blocking the enzyme glyphosate targets, which is why it’s labelled safe on grass and lawns while glyphosate kills anything green it touches. It’s the right call for brambles growing through or right alongside a lawn or verge. For open ground where you don’t care about the grass, a straight glyphosate does the same underlying job.
Can I cut back my neighbour’s brambles growing over my fence?
Generally yes, to your side of the boundary, without needing to ask first. That comes from a long-standing legal principle that lets a landowner cut back encroaching growth from their own land, the same one that applies to a neighbour’s ivy or bindweed. You can’t go onto their land to do it, and the cuttings are technically still theirs to offer back. If it’s not a one-off overhang but persistent neglect on a boundary, a council can sometimes get involved through a separate community-protection route, though that’s a slower path than just cutting back what’s over the line yourself. None of this is legal advice.
Can I compost bramble cuttings?
Not on a normal home compost heap, no. Roots and even chopped fragments can regenerate from small sections, so an unshredded cutting left near soil can simply root again. Shred or chop the canes small before putting them in council green waste, and deal with any dug-out roots separately rather than adding them straight to an open heap.
Are bramble thorns dangerous, do I need a tetanus jab?
The scratch itself usually isn’t serious, but the puncture wound can seal over quickly and trap in soil-borne bacteria, and gardening soil carries a genuine tetanus risk. If you’re not sure your tetanus vaccination is up to date and you’ve had a dirty puncture wound, it’s worth getting checked rather than assuming it’s fine. Heavy gloves are the simplest precaution.