The pink has a different habit of growing . It doesn't form clumps like the others so I keep it in a pot.
It seems to shoot up starts 4-6 inches away from the other shoots , makes it hard to weed around .
Be glad to send some your way
May need to wait till finish blooming then cut back by half , it seems rather tall this year , I think due to so much rain.
I grow it in one of the other gardens I tend and it is in a hot dry area and never gets more than a foot.
Cinda