Digitalis (Foxglove)
Digitalis mertensia, a strawberry pink biennial that grows quite tall.
This is a lovely old-fashioned plant that self-seeds in a spot it likes, so that the biennial type can be in bloom year after year, and the D. ambigua multiplies annually where it's happy.
Like most perennial plants, it likes a rich, well-drained soil with regular moisture. Unlike many, it will rebloom later in the summer if deadheaded.
It will take some shade, but is happy here in full sun.
(Yes, it's poisonous; but who eats it anyway?)
Pale yellow Digitalis ambigua, the only true perennial foxglove, blooms here with Siberian iris and amsonia.