This plant grows in semi shade, is about 2 1/2 ft tall & has a pink flower, similar to bee’s balm, in bloom now. I have tried to figure out what it is but had no luck.
The plant in question appears to be Centaurea dealbata, commonly called Persian cornflower or knapweed. Centaurea is a genus of between 350-600 species of herbaceous thistle-like flowering plants in the Asteraceae family. These plants are drought tolerant and are easily grown in average, dry to medium, well drained soil in full sun to part shade. Centaurea dealbata is a clump forming perennial that typically grows 60-76 cm in height and 60cm wide.The flowers are lavender-rosy pink in colour and 5-7cm in diameter. Bloom time is from late spring to early summer.
The following website provides additional information on this herbaceous perennial: https://www.missouribotanicalgarden.org/gardens-gardening/your-garden/plant-finder/plant-details/kc/d514/centaurea-dealbata.aspx