Now I know – it’s Salvia forskaohlei – and Balkan, not Bulgarian…

orskaohlei...Salvia forskaohlei (Forskahl's Sage) (Indigo Woodland Sage) The large, almost triangular leaves of this Balkan native make a striking base for the long spires of white-streaked, violet-blue blooms where robust flower stems arch gracefully above the basal foliage, lying close to the ground. for more reading.... http://www.worldofsalvias.com/gallry12.htm http://www.telegraph.co.uk/gardening/gardeningadvice/10986782/Dream-of-colour-Growing-salvias-is-the-answer.html http://gardendrum.com/2013/04/22/favourite-autumn-flowering-salvias/