Why is Japanese Knotweed a problem?

Japanese Knotweed is an unknown danger in the UK. Many people are unaware of the damage an untreated area of this plant can do to property, riverbanks, pavements and roads. It is believed that Japanese Knotweed costs the UK an estimated £1.5 billion per year in treatment and removal. So why is it such a problem?

There are four main reasons this plant is considered harmful to gardens across the country:

• It spreads quickly, usually via rhizomes and cut stems or crowns
• It is detrimental to our native flora, often out-competing it for sunlight
• It is complicated and difficult to fully eradicate
• It has the ability to cause significant structural damage to buildings

Now it is more than likely you were not aware of the impact this plant is having on the UK. Due to its aggressive nature and ability to spread quickly, Japanese Knotweed is listed under the Wildlife and Countryside Act 1981 as 'a plant that is not to be planted or otherwise introduced into the wild'. This means you have a legal obligation to contain the spread of Japanese Knotweed if it is present on your land.

Unfortunately for homeowners, Japanese Knotweed can flourish in even the poorest soils, spreading quickly and overwhelming all other native plants in its path. It is especially dangerous as it has the strength to go through walls, tarmac and concrete. Scientists have gathered evidence that suggests a complete new plant can grow from a piece of rhizome the size of a pea.

If you believe you may have Japanese Knotweed present in your garden, contact WWCS today for expert help in its treatment and removal.