• 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

Ammi majus



© � RHS

  • Other common names Bullwort
    Common bishop's weed

    False bishop's weed
    Herb William

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  • Genus Ammi can be annuals or biennials, upright or spreading, with fern-like, pinnately divided leaves and large, branched umbels of small creamy-white flowers in summer

  • Family Apiaceae / Apiaceae

  • Species Ammi majus is an upright annual with 2 to 3-pinnate leaves and compound umbels of small white flowers in summer


  • Foliage Deciduous

  • Habit Columnar_Upright#Columnar/Upright



  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered or Exposed


  • Chalk


  • Chalk


  • Chalk


  • MoistureWell-drained

  • SoilLoam, Sand, Chalk

  • pHNeutral, Acid, Alkaline


  • Ultimate height

    0.5-1 metres

  • Ultimate spread

    0.1-0.5 metres

  • Time to ultimate height

    1-2 years

How to grow

Cultivation Grow in any well-drained soil in full sun or partial shade, provide support when seedlings reach 7-10cm (3-4in) high

Propagation Propagate by seed sown in situ in spring

Suggested planting locations and garden types Flower borders and beds Cottage & Informal Garden Wildflower meadow

How to care

Pruning Cut back after flowering

Pests Generally pest free

Diseases Generally disease free

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