• 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

Liatris spicata

button snakewort

button snakewort

© RHS 2002

  • Other common names button snakewort
    Kansas gay feather

    dense blazing star

    see more
  • Synonyms Liatris calilepis
    Liatris callilipes

    Liatris spicata callilepis

    see more
  • Family Asteraceae

  • Genus Liatris are herbaceous perennials with narrow, grass-like foliage and erect, bottlebrush-like spikes of flowers which open from the top down

  • Details L. spicata is a perennial to 70cm in height, with narrow foliage and purplish-pink flower spikes in late summer and early autumn

  • Plant range E North America

Characteristics

  • Foliage Deciduous

  • Habit Tufted

  • 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)

    H7

Colour

Sunlight

  • Full Sun

  • Aspect South-facing

  • Exposure Exposed or Sheltered

Soil

  • Chalk

    Clay

  • Chalk

    Loam

  • Chalk

    Chalk

  • Chalk

    Sand

  • MoistureMoist but well-drained

  • SoilClay, Loam, Chalk, 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 light, moderately fertile soil that is reliably moist but not wet overwinter; full sun is essential

Propagation Propagate by seed sown in pots in a cold frame in autumn. Propagate by division in spring

Suggested planting locations and garden types Flower borders and beds Cut Flowers Prairie Planting Wildlife Gardens

How to care

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

Pests Generally pest free

Diseases Generally disease free

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