About
Clump-forming deciduous herbaceous perennial with stems that reach 50cm (20in) high and as much across. In late summer to autumn, deep blue-violet, semi-double daisies are produced, with a contrasting yellow centre.
About the genus
Symphyotrichum includes around 90 species of annuals, biennials and perennials, mostly spread through the Americas, that were formerly included within the genus Aster. Leaves are simple, lance-shaped and entire, but it is their daisy-like flowerheads that they are grown for; central disc florets are typically yellow, surrounded by strap-shaped ray florets in shades of pink, blue, purple or white
Growing conditions
SunlightFull sun, Partial shade
Soil typeChalk, Clay, Loam, Sand
Soil pHAcid, Alkaline, Neutral
Soil moistureMoist but well-drained
AspectSouth-facing, West-facing, East-facing
ExposureExposed, Sheltered
UK hardinessH6
Plant details
Plant typeHerbaceous Perennial
HabitBushy, Clump forming
FoliageDeciduous
Height0.1-0.5 metres
Spread0.1-0.5 metres
Time to full height2-5 years
Suggested usesCity and courtyard gardens, Cottage and informal garden, Patio and container plants, Wildlife gardens
Care notes
CultivationGrow in moderately fertile, moist but well-drained soil in full sun or light shade. See aster cultivation
PruningCut stems close to the ground in late autumn
PropagationPropagate by division in spring; divide every third year to maintain vigour
Pest resistanceMay be susceptible to leaf and bud eelworms, slugs and snails
Disease resistanceAsters may be susceptible to Verticillium wilt, Powdery mildews and grey moulds