• 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

Knautia arvensis

Field scabious

Field scabious

© � RHS 2002

  • Other common names Field scabious
    Bachelor's buttons

    Black soap
    Blue buttons
    Blue caps
    Clodweed
    Egyptian rose
    Gypsies' rose
    Gypsy rose
    Lady's cushion
    Purple buttons
    Scabridge

    see more
  • Synonyms Scabiosa montana Mill.

  • Genus Knautia can be annuals or perennials, and may have simple or pinnately lobed leaves and scabious-like flower-heads

  • Family Caprifoliaceae / Caprifoliaceae

  • Species K. arvensis is a clump-forming perennial with lax stems bearing simple or pinnately lobed leaves and lilac-blue flowerheads to 4cm across in summer and autumn

  • Plant range Europe, Asia

Characteristics

  • Foliage Deciduous

  • Habit Clump-forming

  • Toxicity

Colour

Sunlight

  • Full Sun

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

  • Exposure Exposed or Sheltered

Soil

  • Chalk

    Loam

  • Chalk

    Chalk

  • Chalk

    Sand

  • MoistureWell-drained

  • SoilLoam, Chalk, Sand

  • pHAlkaline, Neutral

Size

  • Ultimate height

    1-1.5 metres

  • Ultimate spread

    0.1-0.5 metres

  • Time to ultimate height

    2-5 years

How to grow

Cultivation Grow in a moderately fertile, well-drained, preferably alkaline soil in full sun. Attractive to bees

Propagation Propagate by seed in pots in a cold frame in spring or propagate by basal cuttings in spring

Suggested planting locations and garden types Low Maintenance Cottage & Informal Garden Wildflower meadow Wildlife Gardens

How to care

Pruning Old flower stems can be cut down after flowering

Pests May be attacked by aphids

Diseases Generally disease free

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