toad lillies may not be entirey suitable if soil is dry as they require moist soil. I have mature fir trees on the east side of my place (shade...
second one is liatrus
quite often pulling up an old plant and splitting it rejuvinates it wonderfully. Also, make sure it's in a sunny position.
I'm a strata maintenance landscaper and as such we sometimes have to do things that we are asked, not necessarily what may be best for the plants....