Its Liatris. Cant give you any more information I'm afraid, but I have one that is looking just like that. It makes a clump and I have had mine a few years now.

Cinderella's right, it's Liatris spicata. I also bought lots at a bargain price from Lidl last year. It likes sun, otherwise not fussy.

It grows up to 4' high and about the same wide, it prefers full sun and likes fairly poor soil.
It'll die down in winter and like any perennial will start to regrow in the spring.
I have several clumps here and love them !!!

Thank you all!...I remembered that it began with 'L'...I too love it...and I don't mind how much it clumps!...loads of bulbs in the pack...got it in pots and in the ground....:)))))))

Hi karen Liatris are also great as cut flowers

Thank you Poppylover and Hi! It's finished now, but I will bear that in mind for next year! :)