About
Aster thomsonii is a perennial that forms dense clumps and can reach heights of up to 1 meter. It features oval, serrated leaves that can grow as long as 10 centimeters, supported by hairy stems. The plant produces flowerheads measuring up to 5 centimeters in diameter, which consist of lavender-blue ray florets surrounding a central yellow disk. These blooms appear on slender branches from late 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, Loam, Sand
- Soil pH
- Alkaline, Neutral
- Soil moisture
- Moist but well-drained, Well-drained
- Aspect
- East-facing, South-facing, West-facing
- Exposure
- Exposed, Sheltered
- UK hardiness
- H6
Plant details
- Plant type
- Herbaceous Perennial
- Habit
- Bushy
- Foliage
- Deciduous
- Height
- 0.5-1 metres
- Spread
- 0.1-0.5 metres
- Time to full height
- 2-5 years
- Suggested uses
- Cottage and informal garden, City and courtyard gardens, Coastal, Wildlife gardens
Care notes
- Cultivation
- Grows best in full sun in a well-drained, alkaline soil with moisture in the spring and summer
- Pruning
- Cut back in late autumn
- Propagation
- Propagate by division
- Pest resistance
- May be susceptible to Tarsonemid mite
- Disease resistance
- May be susceptible to Verticillium wilt and grey moulds