• 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

Monarda 'Beauty of Cobham'

Bergamot 'Beauty of Cobham'

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
Bergamot 'Beauty of Cobham'

© � RHS 1998

  • Other common names Bergamot 'Beauty of Cobham'

  • Genus Monarda can be annuals or clump-forming herbaceous perennials with aromatic, ovate leaves and terminal whorls of 2-lipped, tubular flowers from summer to early autumn

  • Family Lamiaceae / Lamiaceae

  • Species 'Beauty of Cobham' is a clump-forming herbaceous perennial to 90cm in height, with aromatic, lance-shaped, purplish-green leaves. Terminal whorls of two-lipped, pale purplish-pink flowers 5cm in length have contrasting purple calyxes

Characteristics

  • Foliage Deciduous

  • Habit Clump-forming

  • Fragrance Leaf

  • 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)
    Old hardiness ratings

    While we update our systems with the new hardiness ratings you may still see old hardiness ratings in your search results. These are denoted as 'Old'.

    • H1 - Requires heated glass
    • H2 - Requires unheated glass
    • H3 - Hardy outside in some regions of the UK
    • H4 - Hardy throughout the UK
    • H1 + H3 - Requires heated glass but may be grown outside in summer

    For full details of the hardiness ratings see

    see more

    H4

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Exposed or Sheltered

Soil

  • Chalk

    Chalk

  • Chalk

    Loam

  • Chalk

    Clay

  • Chalk

    Sand

  • MoistureMoist but well-drained

  • SoilChalk, Loam, Clay, Sand

  • pHAcid, Alkaline, 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 moderately fertile, humus-rich, moist but well-drained soil in full sun or partial shade. Protect from excessive winter wet and do not allow to dry out in summer. Lift and divide every three years.

Propagation Propagate by division in spring or root basal cuttings in spring

Suggested planting locations and garden types Flower borders and beds Cottage & Informal Garden Prairie Planting Wildlife Gardens

How to care

Pruning Deadhead regularly then cut stems down to the ground in autumn

Pests May be attacked by slugs

Diseases May be subject to powdery mildews

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