Plant ID please

in Plants
now that the perennials are all doing their thing, I have so many plants coming through that I don't know the names of
i dont want to overload the forum with them, so I will do them a bit at a time, you'll all be glad to know!
first two... And thank you
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Persicaria probably P. bistorta
Centaurea montana
Fabulous, thank you!
2 at a time is good, my ageing brain gets confused when there's yards of them
I wouldn't remember more than two at a time anyway - my brain is fried!
Bees love Centaura Montana keen
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Great news - love a bit of buzz
I usually have to give Centaura a little support unless it's well supported by surrounding plants - a few twiggy sticks are fine.
Thanks topbird - they look pretty packed in but I'll keep an eye on that