About
Aster 'Cassandra' is a hardy perennial that typically reaches heights of 60 to 80 centimeters. It features narrow, vibrant green foliage and produces numerous small flowers in a light lilac-blue hue, each adorned with a creamy-yellow center. These blooms appear on upright stems from summer through autumn.
About the genus
Aster includes perennials, annuals, and subshrubs, typically characterized by slender leaves and flowers that resemble daisies, either appearing alone or in clusters.
Growing conditions
- Sunlight
- Full sun
- Soil type
- Chalk, Clay, Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Moist but well-drained
- Aspect
- South-facing, West-facing, East-facing
- Exposure
- Exposed, Sheltered
- UK hardiness
- H7
Plant details
- Plant type
- Herbaceous Perennial
- Habit
- Clump forming
- Foliage
- Deciduous
- Height
- 0.5-1 metres
- Spread
- 0.5-1 metres
- Time to full height
- 2-5 years
- Suggested uses
- City and courtyard gardens, Coastal, Cottage and informal garden, Patio and container plants
Care notes
- Cultivation
- Grow in moist but well-drained, moderately fertile soil in an open, sunny position. See aster cultivation
- Pruning
- Deadhead spent flowers to tidy, cut back stem close to the ground in late autumn
- Propagation
- Propagate by division in spring or root softwood basal cuttings in spring
- Pest resistance
- May be susceptible to leaf and bud eelworms, slugs and snails
- Disease resistance
- May be susceptible to Verticillium wilt, powdery mildews and grey moulds