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We have combined these two powerful search tools into a single Find a Plant service searching over 250,000 plant records.
Virtually all of the features of the old searches are still available and in addition we have added several new features to create a more comprehensive and user friendly search experience.
When using this search
Search by plant name, key attributes or both to find plant details and a list of
AGM plants have been through a rigorous trial and assessment programme. They are:
This plant will provide nectar and pollen for bees and the many other types of pollinating insects.
It is included in an evolving list of plants carefully researched and chosen by RHS experts. Divided into 3 groups these lists, linked below, are maintained by a team of RHS staff and are reviewed annually.
the RHS today and get 12 months for the price of 9
Other common names
perennial cornflower 'Amethyst Dream'
Centaurea may be annuals, perennials or subshrubs, with simple or pinnately lobed leaves and showy thistle-like flowers-heads, often with enlarged outer florets
'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
Habit Mat forming
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
Aspect South-facing or North-facing or East-facing or West-facing
Exposure Exposed or Sheltered
MoistureMoist but well-drained
SoilLoam, Chalk, Sand, Clay
pHAcid, Alkaline, Neutral
Time to ultimate height
Best grown in moist but well-drained soil in sun or partial shade. May need staking and can be invasive
Propagate by division in spring or autumn
Suggested planting locations and garden types
Flower borders and beds Cut Flowers Flower borders and beds
Cottage & Informal Garden Prairie Planting Coastal Patio & Container Plants
Pruning Deadhead regularly to prolong flowering, and cut back in autumn
Pests Generally pest free
May be affected by powdery mildews
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.