Heads up! A recent issue of Better Homes & Gardens featured a new "reblooming" lilac called 'Bloomerang'. It's sold by White Flower Farm and probably others. A word of warning: It might grow well in the Northeast, but trade nurseries in the Midwest won't carry it. The reasons: 1.) It is very susceptible to powdery mildew, leaf spots, and blights! 2.) To get it to rebloom, you have to shear it back by a third and then wait. You can do this to dwarf Korean lilac and get the same result! 3.) The color is pale purple... blah!
Not worth it... especially at the asking price! (However, if anyone has had a good experience with this plant, chime in!)