Japanese Knotweed Treatment and Control in Cardiff by Professionals – Green Leaf Remediations

Do you have knotweed at your property or home? Read on the web how this will probably set you back £1,000’s? Will it impact your mortgage or potential to sell your own home? Don’t fret! Green Leaf Remediation can supply expert services for the treatment and management of knotweed in Cardiff, and be reassured it does not cost as much as you might think.

Japanese Knotweed is a perennial weed that will grow and spreads fairly quickly if not controlled. The weed suppresses other plant life growing around it from its crown and rhizomes (root system) that spread extensively underground. The shoots die out above ground in the winter and re-emerge above ground once more in late springtime, early summer months. Any effectively-established shoots can grow more than 9ft high and can colonise the soil within a few years. There are plenty of articles that say it is possible to kill the roots with chemicals, however, you need an NPTC qualified person to utilise any chemical substances resulting from new legislation which covers the control, and removal of Knotweed. There are plenty of myths that say you are able to remove Knotweed yourself, however, this is an extremely difficult and intricate procedure and frequently, not successful unless you use a knotweed consultant. In the peak of the growing season, 60% of the Knotweed plant is its roots underground so removal is incredibly challenging and it spreads wildly from one tiny fragment of crown or rhizome. Removing Knotweed material without having considerable knowledge carries a very high chance of scattering the plant to other parts of the soil which were previously unaffected.

How to get rid of Knotweed?

There are many methods of eliminating Knotweed and a Knotweed Specialist will be able to advise you of the best and most effective approach.

Stem-Injection is a low impact way of removal and there is little probability of disturbing or killing the plants and flowers growing about it. The stem injection method is used for smaller areas of Knotweed where it has established itself between plants and vegetation that you might want to keep. It is also an approach generally utilised when Knotweed is in close proximity to a watercourse. The stem-injection process may be used in dry or inclement weather conditions and the soil can’t be disturbed following a treatment.

Foliar Spray Application is frequently used and is probably the most favourable control methods along with stem-injection. The process can be used to manage the Knotweed over several growing seasons. Determined by how big the area of Knotweed is it is often sprayed 2-3 times in the first year and once in the subsequent years. The chemical used is an Environment Agency approved herbicide and requires dry weather conditions and also the soil to remain undisturbed in subsequent years to be effective.

Weed Wiping Method is the leaves of the plant being wiped with a sponge which is soaked with the necessary herbicide. It’s a low impact treatment and doesn’t kill or bother the foliage encircling it, even so, its use depends on the size of the area of knotweed.

Bund/ Stockpiling Method is a combined treatment making use of stem- injection or foliar application, followed by excavating the underground material and removing the soil and materials to a different location where the emergence of ‘new shoots’ can be subjected to further herbicide application. This method is used on sites where you need the removal of the knotweed to be quick and not done over several seasons so is consequently especially good for building plots of land and development sites as work can proceed without delay.

Cell Burial/Root Barrier Method is a treatment applied when there is enough space on site to make a cell burial or utilising a root barrier to avoid the considerable costs of transporting the soil and waste to landfill. Cell burial buries the Knotweed waste to a minimum depth, or if encapsulated inside a geo-membrane it can be closer to the surface of the ground. Root barriers can be installed both vertically and horizontally when there is a danger of cross-boundary contamination. Again, a method frequently used on development sites when building work has to start immediately.

Excavation & Removal Off-Site is a legitimate and quick control option which has its advantages for development sites if done correctly, having said that, a great deal of Knotweeds Industry Experts are not advocates of it mainly because it raises significant logistical difficulties. The challenges being there is an extremely high chance of the Knotweed spreading and also the cost to securely transport the material to a designated landfill site. There’s also a considerable duty of care requirements under the Environmental Protection Act (EPA) 1990. In conclusion, Excavation & Removal should only be used as an absolute last measure.

Is Knotweed Harmful to Dogs, Cats and People?

Essentially, Japanese Knotweed is not toxic and harmful to dogs, cats, people or any other animals like some other extremely invasive plants. It is not harmful to touch, nevertheless, always use extreme care when in close proximity to it to avoid inadvertently allowing it to spread.

Japanese Knotweed would probably be referred to as ‘poisonous’ by developers and homeowners due to the very invasive growth, ability to spread from a tiny particle left and how difficult it is to eliminate fully.

Some Knotweed Myths (several of which are exploited by a few companies for financial gain)

• “It will grow through solid concrete”

• “It will destabilise foundations”

• “It will cause structural damage”

• Property affected by Japanese Knotweed is not mortgageable

Essentially, if the previous groundwork or construction has been performed to an acceptable standard then Knotweed will not grow ‘through solid concrete’, it does not destabilise solid foundations and it is highly, highly unlikely to ‘cause’ architectural damage. In fact, these claims are deceptive, to say the least, and in some cases, totally untrue.

Nevertheless, in certain situations, if the foundations or concrete are old, badly constructed and have pre-existing cracks or fractures within, then Knotweed will certainly manipulate any weak spot in its quest for light and water and definitely will swiftly establish itself, whilst exacerbating the original fracture and possibly cause the structure to disintegrate.

Green Leaf Remediation Specialists covers the whole of South Wales (including Swansea, Cardiff and Newport), West Wales up to North Ceredigion & Powys and throughout South Glamorgan & Gwent. Additionally, we carry out contracts in the West Country, as far North as Shropshire and into the Midlands & Birmingham areas.

We are a fully qualified Japanese Knotweed Certificated Surveyor (JKCS), family run business We specialise in controlling Japanese Knotweed, other invasive plant species and ‘general nuisance weeds’ that are found in the UK for residential premises and property development sites.

We also provide tree services, such as pollarding, crowning, pruning, felling, through our NPTC chainsaw operators, all of whom possess a vast amount practical experience within the forestry industry.

Our Qualifications & Accreditations incorporate:

• City & Guilds NPTC Level2

• Principles of Safe Handling& Application of Pesticides (PA1/ PA6)

• Principles of Safe Handling& Application of Pesticides near water (PA6AW)

• Herbicide Stem Injection

• Property Care Association

• The Control& Eradication of Japanese Knotweed Surveyor’s Training Course

• Qualified Technician (PCAQT) in Japanese Knotweed

• Accredited Surveyor in Japanese Knotweed

While there are many contractors who operate within the UK weed control industry that are legitimate, knowledgeable and thorough experts, there are regrettably plenty of businesses who claim to have the experience, qualifications and accreditations to ‘eradicate’/ ‘eliminate’ Japanese Knotweed at low cost. Nevertheless, we would advise anyone to exercise caution and to ensure the service provider/business you enlist to carry out the control programme are qualified to do so and they abide by the industry codes of practice.

Give us a call on 01269 591651 or 07531 142316 and one of our experts will be able to answer any questions you may have and also to arrange a site visit.