• 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

Gentiana 'Strathmore'

gentian 'Strathmore'

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
gentian 'Strathmore'

© RHS 2002

  • Other common names gentian 'Strathmore'

  • Family Gentianaceae

  • Genus Gentiana can be annuals, biennials, herbaceous or evergreen perennials, mostly with showy, trumpet or salver-shaped flowers

  • Details 'Strathmore' is an herbaceous perennial with trailing stems to 15cm in length, bearing narrow leaves and solitary, terminal, sky-blue, funnel-shaped flowers up to 5cm in length, with whitish stripes outside

Characteristics

  • Foliage Deciduous

  • Habit Trailing

  • 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

  • Partial Shade

  • Aspect West-facing or East-facing

  • Exposure Exposed or Sheltered

Soil

  • Loam

    Loam

  • Sand

    Sand

  • Clay

    Clay

  • MoistureMoist but well-drained

  • SoilLoam, Sand, Clay

  • pHAcid, Neutral

Size

  • Ultimate height Up to 10 cm

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow in reliably moist but well-drained, humus-rich, acid or neutral soil. Site in sun only where summers are cool and damp, otherwise site in partial shade

Propagation Propagate by division in spring

Suggested planting locations and garden types Flower borders and beds Garden Edging Underplanting of Roses and Shrubs Cottage & Informal Garden Patio & Container Plants Rock Garden

How to care

Pruning No pruning required

Pests Slugs, snails, glasshouse red spider mite and aphids may be a problem

Diseases Prone to a rust and soil fungal diseases

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