Japanese Knotweed

If you have this stuff in the UK you are unable to sell the house/get a mortgage. I would be very surprised if the builder decided to put it in.

quote:

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This is something our builder decided to go with in our beds.

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I think I would move, no joke. That's coming from someone fighting a bamboo infestation. Knotweed roots can grow multiple feet deep and yards wide. It's significantly worse than bamboo by a large margin.


If it's any help, the way I've knocked back the bamboo is manually digging up rhizomes, cutting the stalks almost down to the earth and pouring in a little bit of max strength glyphosate directly into the open stalk right after it's freshly cut. In hindsight i probably should've rented a mini excavator to dig because it was hard work.

Sue your builder. Terms are he buys your house at market cost and covers closing closing plus inflation prices at your new house.

real talk assuming this stuff is currently confined to a bed/beds. Hire a landscaper with an excavator and have him completely excavate the bed at least a foot down maybe two. Leave the bed open the rest of the summer (pump it out when needed) and aggressively kill any shoots. This winter you can fill in back in and start over