• 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

Lychnis chalcedonica

Maltese cross

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
Maltese cross

© � RHS 2002

  • Other common names Maltese cross
    Jerusalem cross

    Common rose campion
    Constantinople campion
    Cross of Jerusalem
    Fireball
    Flower of Bristow
    Flower of Constantinople
    Gardener's delight
    Gardener's eye
    Great candlestick
    Knight's cross
    London pride
    Meadow campion
    None-such
    Red Robin
    Scarlet lightning
    Scarlet lychnis
    Tears of Christ

    see more
  • Synonyms Lychnis chalcedonica 'Red Cross'

  • Genus Lychnis can be biennials or perennials, with simple leaves and tubular, salver-shaped or star-shaped flowers in terminal clusters

  • Family Caryophyllaceae / Caryophyllaceae

  • Species L. chalcedonia is an erect herbaceous perennial to 1m in height, with oval leaves and small, bright vermilion flowers in compact, domed heads 10-12cm in width

  • Plant range European Russia

Characteristics

  • Foliage Deciduous

  • Habit Columnar_Upright#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)
    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

    H7

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered

Soil

  • Chalk

    Sand

  • Chalk

    Loam

  • Chalk

    Chalk

  • MoistureWell-drained

  • SoilSand, Loam, Chalk

  • 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 moist, fertile soil in sun or partial shade. May require support in windy situations

Propagation Propagate by seed in pots in a cold frame as soon as seed is ripe or in spring. Propagate by division or basal cuttings in early spring.

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

How to care

Pruning Deadhead to prolong flowering then cut down in the autumn

Pests May be attacked by aphids and slugs

Diseases Generally disease free

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