How to get rid of invasive bamboo: The six steps to remove ‘Japanese knotweed 2.0’ that’s forcing its way through driveways, floors and ovens – causing hell for homeowners
With Britain facing a growing number of horror stories involving invasive bamboo, attention is turning to how to rid your garden of the menace.
Horticultural experts offer a range of advice on what to do with the plant, whether it’s taking over your flower beds or bursting through your kitchen floor.
Overgrown bamboo is a problem that can take upwards of £3,500 to remove, but if it’s caught early a few DIY steps can stop it becoming a more serious issue.
The plant can be removed by excavating the root ball from the ground and getting rid of every stem to prevent new shoots from emerging.
Now, as the UK grapples with the crisis of ‘Japanese knotweed 2.0’ – which is seeing a growing number of horror stories involving the plant – MailOnline brings you a simple guide on how to detect and tackle a bamboo invasion on your property.
1) Investigation
Bamboo should not be planted too deeply into the soil, so it should therefore be reasonably straightforward to see where the root ball sits.
Check if the bamboo has horizontal roots, also known as ‘runners’. Experts suggest that any runners longer than 25cm will likely need immediate work.
However bamboo shoots could also pop up through solid barriers such as in patios and conservatory floors, which can present a more complicated problem.
2) Excavation
If you’re facing a bamboo invasion in the garden, you will likely need to excavate the underground rhizomes to regain control.
The best way of doing this is to dig a trench around the bamboo stand, then carefully sever and remove the rhizomes with a fork or trowel.
It is also important to excavate the area carefully to avoid causing damage to other nearby plants or structures.
A professional might also need to use small machinery to remove the root ball – such as a small digger with a toothed bucket or a ripper attachment.
3) Disposal
It’s important to dispose of bamboo roots properly to avoid regrowth. Compost them if possible, but you may also want to take them to a proper green waste facility.
4) Barriers
If a bamboo invasion has happened again despite a barrier being installed in the past, it is very important to improve the effectiveness of this for the future.
Look for gaps, cracks or any other signs of deterioration – and reinforce the barrier, which will remain your best defence against a future bamboo invasion.
5) Chemicals
If you cannot excavate some areas of the bamboo, you may need to consider herbicides – but leave this to a professional who will advise on the best chemical.
The Royal Horticultural Society advises gardeners to only use chemical controls – specifically regulated weedkillers – in a ‘minimal and highly targeted manner’.
6) Maintenance
It’s important to often check the area of the bamboo invasion even once it is removed or has been treated.
Regularly look at the area and take out any shoots or rhizomes that appear – and continue to inspect any barriers installed to ensure their effectiveness.
If the bamboo remains, severing any runners should be done a couple of times a year to keep it contained – or, if it is small, you could put it in a strong ceramic pot.
The advice comes amid a growing number of horror stories involving the invasive plant, which grows at astonishing speed and can cause damage quickly – often without the homeowner’s knowledge.
It was more than 15 years after moving into her new home that retired nurse Beverley Koonjul first noticed an issue with bamboo.
She had asked a professional to bed in two bamboo plants to help create a bit of privacy in the garden of the home she shared with her husband in Hastings in 2007.
They thought nothing more of it until 2022, when the plant suddenly began to sneak beneath their and their neighbour’s gardens, with shoots popping up – despite the two properties being separated by a narrow path with slabs on top.
‘My neighbours were a bit annoyed,’ she said. ‘Then it came so close to the house and I got really scared. It’s a huge expense that we could really have done without, but there’s nothing we can do about it.’
A clue as to why bamboo is becoming more of a problem may lie with bamboo’s popularity in garden makeover TV shows.
Bamboo’s aggressive growth has earned it a notorious reputation akin to Japanese knotweed, known for its ability to penetrate building structures and wreak havoc on properties – including in this living room
It poses a legal risk if bamboo encroaches on to neighbouring properties or comes up through the floorboards in a home, and can result in prosecution or thousands of pounds worth of fines
Beverley Koonjul’s experience represents one of a growing number of horror stories involving the invasive plant, which grows at astonishing speed and can cause damage quickly
Specialists have had to be called in for cases where the bamboo invasion has caused major problems, in some cases costing tens of thousands of pounds to repair when it has found its way under a boundary wall and into a neighbouring garden
A neighbouring bamboo plant came through the raised beds, made of bricks and railway sleepers, in Isobel Chetwood’s garden
Rooting out bamboo can be difficult work and even require a digger
The roots had to be removed from under a patio by a specialist, costing the neighbour’s landlord £10,000
Emily Grant, director of operations at UK-based invasive plant specialist Environet, said ‘This is Japanese knotweed 2.0.
‘I think 15 years ago, every week gardening programmes were showing people putting bamboo in, it was literally everywhere.
‘The extent of its popularity is very evident now. It was the ‘thing’ 15 years ago.
‘But it can quickly get out of control.’
It was a similar story for homeowner Isobel Chetwood from Cheshire.
The 68-year-old former GP practice manager was only aware there was a problem with the bamboo planted by neighbours along the adjoining boundary when shoots began to appear in a raised bed made of heavy railway sleepers and bricks she had designed for her strawberry plants.
Ms Chetwood began to cut down the new growth, but the plant quickly became unmanageable.
She said: ‘Last year the bamboo shoots started appearing prolifically and I could see it was clearly coming from next door.
‘My raised bed is constructed of brick and heavy wooden sleepers, which you’d think is fairly robust, but in no time at all the bamboo was forcing its way beneath the sleepers, pushing them apart.’
The landlord of the property next door treated the problem with weedkiller. But that only served to cause it to grow more vigorously into Ms Chetwood’s garden instead, with new shoots popping up.
A survey later revealed the extent of the infestation, and she sent it to the landlord.
She said: ‘I think that’s when he realised we needed professional help.
‘Fortunately, his landlord’s insurance covered the cost of excavating the bamboo on my side of the fence, but he had to pay for the removal on his side since it had been deliberately planted by tenants.
Buyers are waking up to the risks posed by invasive bamboo, which can find its way up through floor tiles
Bamboo is an invasive plant that can ruin people’s homes if left unchecked – although there are simple steps to prevent it coming in from neighbouring gardens
The plant has the remarkable power to grow through cement and asphalt
This image shows bamboo growing through a paving slab in a garden
It typically costs upwards of £3,500 to remove the bamboo from a residential property, although remedial work can run into tens of thousands of pounds
Isobel Chetwood, of Knutsford, Cheshire, noticed there was a problem when shoots of the fast-growing plant began appearing through a raised bed she had designated for strawberry plants
Emily Grant, director of operations at Environet, said invasive species of bamboo can quickly get out of control and suggested homeowners take a look at the roots of the plant to see if they need to be removed
The bamboo at Beverley Koonjul’s home was in place for 15 years before it started causing problems for her and her neighbours
‘I’d advise anyone thinking about planting bamboo to avoid it at all costs. It shouldn’t be sold at garden centres at all in my opinion, or at least not without a clear warning.’
And it was a lucky escape for Lois Connelly, who was in the process of buying her first property – a terraced house in Bristol – last autumn when a survey raised an issue with bamboo in the front and back gardens.
Not only was the bamboo posing a threat to underground pipes and drainage, the survey said it was already encroaching on a neighbouring property.
Ms Connelly, 40, said: ‘It was my sister who spotted the bamboo initially when we viewed the property.
‘Although it had been cut back, we could see it had spread and was growing right up against the house on both sides.
‘When the surveyor flagged it up on his report, recommending that it be checked by an expert, I realised I was going to have to do something about it.’
Ms Connelly set about renegotiating the sale price of the home with the vendor. It was only when she threatened to walk away over the cost of remedial work that the seller agreed a price reduction covering half of the amount it cost to remove it.
She said: ‘The bamboo was already on the run and it was only a matter of time until it started causing damage to the property.
‘As it was already encroaching into next door’s garden, I was also worried about the risk of a legal case against me as the new homeowner. To me, this situation really highlights the lack of awareness around invasive bamboo, as even the seller’s estate agent didn’t seem to recognise the problem at first.
‘I would advise anyone buying a property with bamboo in the garden to have a professional survey done and if necessary, be prepared to walk away if the seller won’t resolve it.’
Bamboo is removed by excavating the root ball from the ground and getting rid of every plant stem, including those that have been severed to prevent new shoots from emerging.
It typically costs upwards of £3,500 to remove the bamboo from a residential property, although remedial work can run into tens of thousands of pounds.
Runners – horizontal roots – can cause a major problem if they reach more than 25cm in length, including penetrating through brickwork and slabs
In one horror case two years ago, a bamboo infestation exploited a weakness in the foundations of a property in Hampshire to emerge through the floor in the living room, hall and kitchen, resulting in the excavation of the entire ground floor at a cost of more than £100,000.
But experts say there is a lack of awareness of the risks.
A YouGov survey of 2,000 people commissioned by Environet last year found that almost a fifth (18%) of British adults have had bamboo on their own or an adjacent property.
Yet, despite the serious threat bamboo poses, spreading faster and further than Japanese knotweed, only 24% of people would be concerned if it was growing near their home.
Environet’s Mrs Grant said: ‘I think the difference between Japanese knotweed and bamboo is that people don’t see it as a threat if they don’t have first-hand experience of it.
‘Just the mention of Japanese knotweed strikes fear into people, whereas bamboo doesn’t – people think of pandas, it doesn’t have the same negative connotations.
‘It’s also a plant that’s available everywhere. People have been lulled into a false sense of security, and they think: If I can buy it, it’s probably not going to be a problem.
First-time buyer Lois Connelly threatened to walk away from a sale over a bamboo invasion
Experts said it could take several years for problems to occur and encouraged potential buyers to do some research before planting
‘Garden centres are much better at not selling the invasive species because they frankly don’t want customers coming back in 15 years’ time and complaining, but they are still available to buy in places.
‘Bamboo can take quite a long time to present a problem. Typically we hear from customers seven to ten years after the bamboo has gone in, telling us, “It was never a problem, but now it’s everywhere”.
‘And unless it’s dealt with, it will continue – it can get out of control.’
Helen Chen, a member of the British Bamboo Society, encouraged anyone thinking of getting a bamboo plant to research it beforehand.
She said: ‘There are about 300 types of bamboo you can grow in the UK and only a tiny number have the capacity to cause this type of damage.
‘You wouldn’t plant a tree without seeing how big it would grow, so it’s a good idea for anyone interested in bamboo to do a little bit of research – look at the height and speed of growth, how vigorous it can be, and talk to a specialist nursery.’
She suggested the Fargesia species was particularly low risk, adding: ‘Bamboos are a great group of plants, they add so much to the garden and are very low maintenance.’
Had a bad experience with bamboo? Email: ryan.hooper@dailymail.co.uk
