Yes, every where, I found them in south of England, USA:east coast west coast and the midwest....
and in INDIA ... at Central park in Salt lake , Kolkata , Horticulture garden and some private gardens...dont remember if I saw them at the KolBotG...
its so common that I have stopped pic taking...
seems malis love them.. plant them and forget them esp for
hedges... and gives a nice blue color... at least in central park they seem to have done so...
Usha di