• AGM plants

    AGM plants have been through a rigorous 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

red valerian

  • Other common names red valerian
    fox

    fox's brush
    German lilac
    Jupiter's beard
    kiss-me-quick
    pretty Betsy
    Spanish valerian
    spur valerian

    see more
  • Synonyms Centranthus ruber 'Pretty Betsy'
    Valeriana 'Coccinea'

  • Family Caprifoliaceae

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

  • Details C. ruber is a woody-based perennial, sometimes grown as a biennial, with grey-green leaves and dense clusters of crimson, pink or white, slightly fragrant flowers from late spring to autumn

  • Plant range Europe, Medit.

Characteristics

  • Foliage Semi-evergreen

  • Habit Columnar/Upright

  • Hardiness

    Hardiness ratings

    All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

    • H1a - Under glass all year (>15C)
    • H1b - Can be grown outside in the summer (10 - 15)
    • H1c - Can be grown outside in the summer (5 - 10)
    • H2 - Tolerant of low temperatures, but not surviving being frozen (1 to 5)
    • H3 - Hardy in coastal and relatively mild parts of the UK (-5 to 1)
    • H4 - Hardy through most of the UK (-10 to -5)
    • H5 - Hardy in most places throughout the UK even in severe winters (-15 to -10)
    • H6 - Hardy in all of UK and northern Europe (-20 to -15)
    • H7 - Hardy in the severest European continental climates (< -20)

    H5

Colour

Sunlight

  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Exposed

Soil

  • Sand

    Sand

  • Loam

    Loam

  • Chalk

    Chalk

  • MoistureWell-drained

  • SoilSand, Loam, Chalk

  • pHAlkaline, Neutral

Size

  • 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

How to care

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

Diseases Generally disease free

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