• 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

Verbascum 'Letitia'

mullein 'Letitia'

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
mullein 'Letitia'

© RHS

  • Other common names mullein 'Letitia'

  • Family Scrophulariaceae

  • Genus Verbascum can be annuals, biennials, perennials or subshrubs mostly with hairy leaves and 5-petalled, saucer-shaped flowers

  • Details 'Letitia' is a bushy, evergreen sub-shrub to 30cm in height, with hairy grey, oblong leaves and abundant purple-centred, bright yellow flowers 1.8cm in width

Characteristics

  • Foliage Evergreen

  • Habit Bushy

  • 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)

    H4

Colour

Sunlight

  • Full Sun

  • Aspect South-facing

  • Exposure Exposed

Soil

  • Chalk

    Loam

  • Chalk

    Chalk

  • MoistureWell-drained

  • SoilLoam, Chalk

  • pHAlkaline

Size

  • Ultimate height 0.1-0.5 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 5-10 years

How to grow

Cultivation Grow in alkaline, poor, well-drained soil in full sun; drought-tolerant plant ideal for rock garden or container in an alpine house. To grow in an alpine house, use equal mix of loam-based compost and grit

Propagation Propagate by root cuttings in winter

Suggested planting locations and garden types Drought Resistant Gravel Garden Rock Garden Patio & Container Plants

How to care

Pruning Remove faded flower spikes

Pests May be attacked by caterpillars and figwort weevil

Diseases May be subject to powdery mildews

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