Rose Campion (Lychnis coronaria or "catchfly") is often mistaken for Lamb's Ear. But it has a beautiful magenta bloom and narrow, gray-green leaves that generally blooms May-July. But the foliage is almost as pretty as the flowers from Spring to Fall. It can get 2-3' tall and 1-2' wide. It spreads nicely and thrives in our crap-tacular rocky clay soil. Like most plants, it grows and blooms best in full sun (but the photo to the left was taken in a place with only part sun). They are very similar to Lamb's Ear in color and texture.
this beautiful photo is from: https://www.flickr.com/photos/martinlabar/6011387366/