With small pink or blue lace caps in profusion.  Easily grown, hardy and very reliable.  The leaves turn deep red in the autumn. (1m)

Gardens found in the 28 pre 2000 surveyed:  DA LHS LAG TR MS WR

Gardens found in the 10 surveyed in 2010: DA LHS WS HIL DIN ESV NAN AW

UKPlant Finder 2012 = 20 Nurseries