• 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

Erysimum 'Bredon'

wallflower 'Bredon'

wallflower 'Bredon'

© RHS 2002

  • Other common names wallflower 'Bredon'

  • Family Brassicaceae

  • Genus Erysimum can be annuals, biennials or woody-based perennials with narrow leaves and dense racemes of often fragrant, 4-petalled flowers

  • Details 'Bredon' is a bushy semi-evergreen perennial to 45cm, with narrow, dark green leaves and short, dense, erect racemes of slightly fragrant, bright yellow flowers 2cm in width


  • Foliage Evergreen

  • Habit Bushy

  • Fragrance Flower

  • 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)




  • Full Sun

  • Aspect South-facing or East-facing or West-facing

  • Exposure Exposed or Sheltered


  • Chalk


  • Chalk


  • Chalk


  • MoistureWell-drained

  • SoilSand, Loam, Chalk

  • pHAlkaline, Neutral


  • Ultimate height 0.1-0.5 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow in poor to moderately fertile, well-drained, neutral or, ideally, alkaline soil; full sun is essential

Propagation Propagate by semi-hardwood cuttings in spring or summer

Suggested planting locations and garden types Flower borders and beds Garden Edging Coastal Cottage & Informal Garden Gravel Garden Mediterranean Climate Plants

How to care

Pruning Trim lightly after flowering to prevent plants becoming leggy

Pests Prone to slugs, snails and flea beetles

Diseases May be affected by a downy mildew, club root and bacterial leaf blight

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