• AGM plants

    AGM plants have been through a rigourous trial and assessment programme. They are:

    • Excellent for ordinary use in appropriate conditions
    • Available to buy
    • Of good constitution
    • Essentially stable in form & colour
    • Reasonably resistant to pests & diseases

Centranthus ruber 'Albus'

Red valerian (white form)

Red valerian (white form)

© � RHS 2002

  • Other common names Red valerian (white form)

  • Synonyms Centranthus alba
    Valeriana 'Alba'

  • Genus Centranthus may be annuals or perennials, with usually simple, opposite leaves and terminal clusters of small, trumpet-shaped flowers

  • Family Caprifoliaceae / Caprifoliaceae

  • Species '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


  • Foliage Semi-evergreen

  • Habit Columnar_Upright#Columnar/Upright



  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Exposed


  • Chalk


  • Chalk


  • Chalk


  • MoistureWell-drained

  • SoilSand, Loam, Chalk

  • pHAlkaline, Neutral


  • Ultimate height

    0.5-1 metres

  • Ultimate spread

    0.1-0.5 metres

  • Time to ultimate height

    2-5 years

How to grow

Cultivation 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.

Propagation 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

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