Bought lots of plants at the end of season. Some died before I got them in the ground, so I put the plants next to the garage to be composted last fall. Well forgot about them and low and behold when I went looking for clay pots I found that some of the plants had come back. This was the only one with out a name tag. any clue? ( photo / image / picture from marikelley's Garden )
Could be Salvia nemorosa 'Snow Hill' It's the only one I have found with the flower stalks like yours.