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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:
© RHS 1998
the RHS today and get 12 months for the price of 9
Other common names
giant scabious yellow scabious
Cephalaria caucasica Cephalaria tatarica hort.
Scabiosa gigantea Scabiosa tatarica
Cephalaria are annuals or perennials with pinnately divided leaves and scabious-like flower-heads
C. gigantea is a perennial forming a clump of pinnately lobed basal leaves, with tall, branched stems carrying light yellow flower-heads to 6cm across in summer
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 East-facing or West-facing or North-facing
Exposure Exposed or Sheltered
MoistureMoist but well-drained
SoilLoam, Chalk, Sand, Clay
pHAcid, Alkaline, Neutral
Time to ultimate height
Grow in a fertile moist but well-drained soil in sun or partial shade. Needs staking in exposed gardens.
Propagate by seed sown in pots in a cold frame in early spring or propagate by division in spring
Suggested planting locations and garden types
Flower borders and beds Cut Flowers
Pruning Cut back after flowering
Pests Generally pest free
Generally disease free
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.
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Join the RHS today and get 12 months for the price of 9