Thistle? Or Not

I don’t know if you remember,  but last year I bought some blue sea holly roots from Walmart after seeing them on a British gardening show.  Only one survived.  I bought another pack of three this year and two have lived.  

The one from last year is blooming now.

 I cannot decide it it looks too much like a thistle. 

I like how the blue color coordinates with my pinks and purples. Maybe next year when the other ones bloom, they won’t look so much like thistles.