I have often been asked if this plant is Japanese knotweed. It does look similar, but is actually a lillic plant. Good news for this home owner!
The Property Care Association have reminded all invasive plant specialists about the concern regarding water primrose. Have you seen this invasive plant? If so please do follow the information in this link:Water primrose Alert!
… or not? An interesting listen from BBC You and Yours programme questioning the 7 metre rule: https://www.bbc.co.uk/programmes/b0bd6ycp
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!
Treating large infestations of Japanese knotweed does take time. Using stem injections six months later can have some good initial effect, but still requires long term monitoring. (Yes for those keen eyes there is more Japanese knotweed in the background of the second photo! At this visit requested not to treat it, which is why monitoring is also so important to control the activity of the plant.)
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
There has been much in the press about Japanese knotweed this week; here is a link to what we think is a more balanced approach from the PCA: https://www.property-care.org/trade-association-sets-the-platform-for-debate-around-new-japanese-knotweed-findings/
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