Moss is a common sight on driveways. It can often be seen growing up through the gaps in between paving slabs - it's very unsightly, but more importantly, it may be a safety hazard.
Moss can be slippery when wet, and a mossy driveway can increase your risk of slipping and falling when you're getting in and out of your car.
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As its name suggests, Japanese knotweed (Fallopia japonica) is native to the Far East. Once upon a time, this plant was to be found only in Japan and neighbouring territories like Korea and China.
Now, as we've previously discussed, Japanese knotweed wasn't - and still isn't - much of a problem in its homeland, simply because the local ecosystem keeps the plant in check.
But at some point, somebody had the bright idea of bringing Japanese knotweed over to Europe, where it was able to run rampant and cause all kinds of problems for us Westerners.
Read More: What Damage Can Japanese Knotweed Do?
This raises the question: just who do we blame for bringing Japanese knotweed to Europe?
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Is It Japanese Knotweed?