About
This rhizomatous perennial about 30-40cm tall, forming a compact clump of erect stems bearing narrow leaves and panicles of reddish-purple, semi-double to double flowerheads to 5cm across, from late summer to autumn.
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, North-facing, West-facing, East-facing
ExposureExposed, Sheltered
UK hardinessH6
Plant details
Plant typeHerbaceous Perennial
HabitClump forming
FoliageDeciduous
Height0.1-0.5 metres
Spread0.1-0.5 metres
Time to full height2-5 years
Suggested usesCottage and informal garden, City and courtyard gardens, Coastal, Patio and container plants
Care notes
CultivationThrives in fertile, moist but well drained soil in sun or partial shade. Plants will benefit from mulching in autumn, and division every few years to maintain vigour. Will not tolerate waterlogging in winter, and may need support, see staking (perennials). For more advice see aster cultivation
PruningCut back in late autumn
PropagationPropagate by division in spring, replanting only vigorous young shoots
Pest resistanceMay be susceptible to slugs and snails on new growth, and to aphids, leaf and bud eelworms and tarsonemid mite
Disease resistanceMay be susceptible to Fusarium wilt, powdery mildews, grey moulds and leaf spots