Can someone identify this purple leaved plant?

Hi all Shooters
Can anyone identify this plant/weed, found when about four inches long, growing in the gravel surrounding my friend's water feature?
Many thanks. It's currently about eighteen inches tall!

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Re: Can someone identify this purple leaved plant?

Reply from Karen

Looks very much like Persicaria 'Red Dragon'. It has tiny white flowers and the foliage starts out red but fades through the summer to rusty copper shades. Herbacious perennial so it will disappear underground in the winter. Grows to about a metre tall. Here's the one in my garden for comparison. Perhaps in a shadier position, the leaves might be less red as with your plant or it could be a different variety of Persicaria perhaps.

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Re: Re: Can someone identify this purple leaved plant?

Reply from jaytee

Agree with Karen... my first thoughts too!

Re: Can someone identify this purple leaved plant?

Reply from Freddie Dunkley

That's great. Thank you so much for your help. I'll plant it somewhere it can flourish next year, as it's currently in a basket! I was wary of it being an invasive weed, so kept it restrained this summer!
Thanks again for imparting your knowledge. My garden would be a weedy wilderness if it weren't for Shoot members x