Aster 'Little Carlow' is my favorite autumn perennial. It lights up the garden with masses of violet-blue daisies with yellow centers. It has a beautiful billowing habit that is very graceful. The trick is to cut it back in early July. My experience is that 'Little Carlow' also benefits from extra watering during dry periods to get the best results. With a little effort, 'Little Carlow' will reward the gardener for the first two weeks of autumn.