Perennial for sun in zone 5a-9b. White flowers. Up to 3 x 3 feet Also known as Aster ericoides 'Monte Cassino', Symphyotrichum ericoides 'Monte Cassino', Dense-Flower Aster, Elongate Aster, Heath Aster 'Monte Casino', Aster pansus 'Monte Cassino', Aste