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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 2002
the RHS today and get 12 months for the price of 9
Other common names
red valerian (white form)
Centranthus alba Valeriana 'Alba'
Centranthus may be annuals or perennials, with usually simple, opposite leaves and terminal clusters of small, trumpet-shaped flowers
'Albus' is an upright perennial, sometimes grown as a biennial, with greyish-green leaves and sprays of small white flowers in late spring and 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 West-facing
SoilSand, Loam, Chalk
Time to ultimate height
Grow in a well-drained soil that is poor to moderately fertile, ideally a chalky or stony soil. Good drought resistance; thrives on walls and in coastal gardens. Needs full sun to flower well.
Propagate by seed sown in spring
Suggested planting locations and garden types
Flower borders and beds Low Maintenance Wall-side Borders Drought Resistant
Cottage & Informal Garden Coastal Wildlife Gardens
Pruning Cut down stems in autumn or if self-seeding is a problem then cut back hard in July after their first flowering
Pests Generally pest free
Generally disease free
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
red valerian (white form)
Buy from £17.97
at the RHS Plants Shop
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Join the RHS today and get 12 months for the price of 9