...that's Stokesia to the left of the Bonfire Euphorbia... so..., partial sun is good? Dry soil best? Also, in what location are you/ these plants living?

Yes Stokesia Bluestone Pink.
I am in Z6a and the soil here is amended clay. I would say the conditions are on the dry side. The plant is doing very well,I believe its 3 years old.
Full sun.
Here is another image