Lookout for Japanese Knotweed

Lookout for Japanese Knotweed

Japanese Knotweed - Looks Like Bindweed?

This could just be the start!

A good stage to catch it

Lookout for Japanese Knotweed

“Japanese Knotweed” is a non-native and invasive plant that we have found in a number of different areas across the Island.  The plant was once imported to the UK for ‘ornamental reasons’ and quickly became out of control.  The plant grows quickly and is very resilient - even growing through tarmac and brickwork and if left unchecked can cause structural damage. 

One the plant has a foothold, it can be very difficult to get rid of because it sends out long rhizomes - long horizontally growing stems that send out lateral shoots and roots. 

To make matters worse, Landlords of properties suffering from the plant run the risk of court proceedings if they fail to stop the plant from crossing onto a neighbours land - the maximum fine for ‘encouraging’ an outbreak is limited to a fine or imprisonment of up to 2 years!   

The plant can be controlled by herbicides but it is not considered to be dormant until a period of more than 3 years of treatment has passed and it shows no sign of re-establishing itself.  One of the most effective ways to control the plant is by digging down up to 3 metres to ensure all of the roots have been removed - a really expensive option by any standard. 

Of course, whilst the Maher Ross Team will always try to identify a Japanese Knotweed outbreak, we are not experts in plant biology!  If in doubt, ask Graham to have a look - he should fairly quickly identify the differences between Knotweed and Bindweed!  The most obvious signs are a ‘flattish’ back to the stem side of the leaves, and a purple hue to the young stalks. 

Further information about Japanese Knotweed can be found at:


If you need any more information concerning this Maher Ross article - please Speak to Graham Jolliffe on 01983 563000.