Aster ericoides (renamed Symphyotrichum) – Heath Aster is native to the central and eastern US and Canada. It is a bushy clump-forming perennial with abundant 1/2″ wide single white flowers, that are occasionally tinted pale blue or pink. It has deep green lance-shaped foliage, with lower leaves drying as the plants come into bloom. Grows 24-36″ high by 12-16″ wide. Zone 5.
Aster dumosus ‘Wood’s Blue’ (syn. ‘Wood’s Light Blue’) (renamed Symphyotrichum) – This fall aster has long-lasting single blooms of a pale lavender-blue with a contrasting yellow center. It flowers from September to October and attracts both butterflies and bees. It bears dark green foliage on compact disease resistant plants. Grows 12-18″ high by 16-20″ wide. Hardy to zone 4.
Aster novi-belgii ‘White Opal’ (renamed Symphyotrichum) – This white-flowering fall aster has thin strap-like petals nicely contrasted by a bright yellow center. It blooms from late summer into autumn and plants can be pinched back before July for more compact growth. Divide every 3 years to maintain vigor. Prefers part to full sun. Grows 12-18″ high by 15-18″ wide. Zone 3.
Aster novi-belgii ‘Coombe Rosemary’ (renamed Symphyotrichum) – A beautiful selection with rich crocus-coloured violet purple semi-double blooms, with a contrasting yellow center. It is a great choice for cutting and using in flower arrangements. Plant in combination with Rudbeckia ‘Goldsturm’ or Helenium. Grows 3′ high by 2′ wide. Hardy to zone 4.
Aster lateriflorus ‘Prince’ (renamed Symphyotrichum) – The tiny 1/2″ wide white-petaled single blooms (with pink centers) are borne in the hundreds to thousands on mature plants and certainly attract the bees. The deep purple foliage gives the appearance of near black at a distance and nicely contrasts the flowers. Grows 2-3′ high by 18-20″ wide. Hardy to zone 5.