I have recently discovered quite substantial stands of Himalayan knotweed near to the river Blackwater, along the way I discovered a house which is obviously inhabited by a builder of some sort and had recently done some building work of their own...I wonder do they realise what this plant is poking up from their building soil?!?! I found out that the house a mere 200 m downstream was the son to this household and guess what was in his back yard too! Classic example of spreading through top soil. Can anyone tell me if Himalayan knotweed presents the same danger to building work as Japanese knotweed??? 
There are a number of other knotweeds out there. This one is a separate species to Fallopia Japonica and therefore is not included in the legislation that criminalises it's spread. Little is known about it in this country apart from that it spreads vigorously and through rhizomes and seed. There doesn't seem to be a figure for the size of rhizome as with Jk or it's ability to break through concrete type surfaces. I've never had experience of this plant but would suspect it has the same properties.
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ReplyDeleteFunny timing...I have just had a report of a plant that looks very mcuh like Himalayan knotweed but I still need to confirm it. Is there any info available on it? NNSS hasnt got an ID sheet for it.
Haha- just read the date of this post. It is definatly Friday... oops! Anyhow - what have you done with it?
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