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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:
the RHS today and get 12 months for the price of 9
Other common names
horizontal calico aster
Aster lateriflorus 'Horizontalis' Aster lateriflorus var. horizontalis
Symphyotrichum includes around 90 species of annuals and perennials, mostly spread through America, that were formerly included within the genus Aster. The Michaelmas daisies are the most widely cultivated
'Horizontalis' is a compact herbaceous perennial with small, narrow leaves and wide-spreading branched sprays bearing tiny white-rayed flowers with reddish centres
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 West-facing or East-facing
SoilSand, Chalk, Loam
pHAcid, Alkaline, Neutral
Time to ultimate height
Grow in moderately fertile, well-drained soil in open sunny position; may need staking
Propagate by division in spring
Suggested planting locations and garden types
Flower borders and beds
Coastal Cottage & Informal Garden Wildlife Gardens
Pruning Cut back in late autumn
Pests Generally pest free
Asters may suffer Verticillium wilt, powdery mildews and grey moulds
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Join the RHS today and get 12 months for the price of 9