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.
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!
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 property‘ To listen please click the link, the article is 27 minutes in: https://www.bbc.co.uk/programmes/m00003t3
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
A revealing article which questions whether bamboo is likely to be as problematic for home owners as Japanese knotweed currently is… read more here: http://www.dailymail.co.uk/news/article-5764259/Is-bamboo-new-Japanese-knotweed.html
Interestingly, Japanese knotweed in the UK is from the female clone and is therefore incapable of setting seed, yet is still able to spread at an alarming rate if untreated. Read more here: https://www.telegraph.co.uk/gardening/plants/11285502/Do-plants-have-a-gender.html
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
An interesting formation of Japanese knotweed I found last week. Its a little stressed but leaves should unfold in the next week or so.
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)!
April brings the start of new growth for many plants, including Japanese knotweed. Here’s what the first shoots look like to help you identify the start of any Japanese knotweed in your garden.