Tag Archives: identification

International Invasive Weed Conference

The International Invasive Weed Conference is being held on 22nd November 2018 and will cover topics Identification, Assessment and Response followed by a panel debate led by the PCA. For more information and to book a place please click here: https://www.property-care.org/conferences/international-invasive-weed-conference-identification-assessment-response/ It should be a very interesting event.


How can you tell if there’s Japanese knotweed?

I am often asked, can you tell if there is Japanese knotweed in the back garden?  This one such example.  The garden is very overgrown with brambles.  If there was a mature Japanese knotweed plant then I would expect it to be growing through the brambles and taking over the garden; however if there is a small young shoot here, it would be very difficult to identify as it would be under the bramble canopy.  So having a look in your neighbour’s garden (if thats possible!) to see if there is any Japanese knotweed is often a good indication for yours – that is if you’ve not been out in the garden this summer and its a bit over grown like this one!

What to do when you find Japanese knotweed

PCA’s Technical Manager for Invasive Weeds Peter Fitzsimons, spoke on the BBC Radio Ulster – On Your Behalf programme about Japanese Knotweed. The programme discusses ‘the issues with Japanese Knotweed, what to do and what not to do when you find it on your propertyTo listen please click the link, the article is 27 minutes in: https://www.bbc.co.uk/programmes/m00003t3

How to identify Japanese knotweed

If you’re concerned a fast growing plant in your garden may be Japanese knotweed, here’s what to look out for:

Bamboo like stems, which are green with purple speckles

Zig-zag stems with flat leaves, heart shaped at the very tip

Roots that snap like a carrot, with an orange circle to them

Invasive plants to take root at RHS Chelsea Flower Show

Experts from the PCA’s Invasive Weed Control Group are to showcase 14 of the good, the bad and the ugly invasive non-native plants which are currently thriving in gardens across the country at this years RHS Chelsea Flower Show. Click here to read more:  http://press.rhs.org.uk/RHS-Shows/Chelsea/Press-releases/Invasive-plants-to-take-root-at-RHS-Chelsea-Flower.aspx



What is the difference is between 3 cornered garlic and few flowered garlic?

Actually they are very similar plants and smell gently of garlic if you brush past them or their leaves are crushed.  Unfortunately they can spread quickly and overtake our native garlic species Ramsons or Wild Garlic (Allium ursinum or Allium vineale)!
Both are considered invasive – would like more information?  Here is a great start ID_Allium_species_(Garlics)