Not the plant you're looking for? Search over 300,000 plants
Herbaceous Perennial

Centaurea montana 'Amethyst Dream'PBR
  • RHS Plants for pollinators

perennial cornflower 'Amethyst Dream'

'Amethyst Dream' is a spreading, herbaceous perennial with grey-green foliage covered in silvery hairs. The bright purple,thistle-like flowers open from scaly buds in late spring and early summer

Buy this plant
Size
Ultimate height
0.1–0.5 metres
Time to ultimate height
2–5 years
Ultimate spread
0.5–1 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Purple Green Grey Silver
Summer Purple Green Grey Silver
Autumn Green Grey Silver
Winter
Position
  • Full sun
  • Partial shade
Aspect

North–facing or East–facing or South–facing or West–facing

Exposure
Exposed or Sheltered
Hardiness
H7
Botanical details
Family
Asteraceae
Native to the UK
No
Foliage
Deciduous
Habit
Matforming
Genus

Centaurea may be annuals, perennials or subshrubs, with simple or pinnately lobed leaves and showy thistle-like flowers-heads, often with enlarged outer florets

Name status

Accepted

How to grow

Cultivation

Best grown in moist but well-drained soil in sun or partial shade. May need staking and can be invasive

Propagation

Propagate by division in spring or autumn

Suggested planting locations and garden types
  • Coastal
  • Cottage and informal garden
  • Patio and container plants
  • Prairie planting
  • Cut flowers
  • Flower borders and beds
Pruning

Deadhead regularly to prolong flowering, and cut back in autumn

Pests

Generally pest free

Diseases

May be affected by powdery mildews

My Garden

Your free RHS gardening coach

Keep track of your plants with reminders & care tips – all to help you grow successfully

My plants
My calendar

My plants

My calendar

My ideas
Manage membership

My ideas

My advice

Get involved

The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.