- The root consists of rhizomes. They can penetrate to a depth of 3m and extend to an area of aprox 7m in radius.
- Hollow bamboo like stems
- Stems are green with red/purple specks
- Grow 2-3m tall creating dense clumps
- Green heart/shield shaped leaves
- Leaves reaching up to 12cm in length
- Creamy flowers on stem tips from August to October
- Resulting seeds are sterile
- Strain commonly found in the UK is a female only plant
- Dont panic.
- Seek professional advice from a qualified contractor such as ourselves to deal with the problem.
- don’t expect a quick fix.
- Avoid trying to deal with this problem yourself – you run the risk of making it worse.
- Do not flail the plant
- Don’t try digging up the rhizome. The tiniest of fragments of the rhizome can transfer spread, the rhizome regenerates readily and will grow into new plants
- Do not spread contaminated soil as this may contain rhizome fragments
- Do not put knotweed through a mechanical chipper – it won’t kill the knotweed
- Do not add to compost- you will infect the compost causing new growth when spread.
- Do not take Japanese knotweed to green waste sites & Do not dump in the countryside
- Remember – it is an offence to cause the spread of Japanese knotweed – Don’t break the law
- Cornish company dealing with Japanese Knotweed for 10yrs with exceptional results
- Cherry Trees is able to help you take control of this very troublesome plant with an effective eradication programme
- We are Cornwall Council Japanese Knotweed Approved Contractors
- We keep up to date with the newest techniques & best practices for products and applications
- Comply with current legislation – Japanese Knotweed Code of Practice
- NPTC qualified operators
- Fully insured
- Full initial consultation at site
- Tailor made management plan being site specific
- Chemical spraying or stem injection or combination of both using herbicides
- Treatment usually takes place between April – September
- Minimum of 2 sprays per year but preferably 3 applications per year
- Treatment taken over 3 years
- Monitoring visits
Knot weed after one treatment
Observe the scale and height this weed can grow to.
Highly destructive with thick stems the weed can destroy masonry.
An invasive plant, Knotweed can grow through concrete.
A typical knotweed plant, observe the height and dark stem.