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  • AGM plants

    AGM plants have been through a rigorous trial and assessment programme. They are:

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    • Of good constitution
    • Essentially stable in form & colour
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Ammi majus

bullwort

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
bullwort

© RHS

11 suppliers RHS Plant Shop from £1.83

  • Other common names bullwort
    common bishop's weed

    false bishop's weed
    herb William

    see more

  • Family Apiaceae

  • 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

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

Characteristics

  • Foliage Deciduous

  • Habit 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)

    H6

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered or Exposed

Soil

  • Loam

    Loam

  • Sand

    Sand

  • Chalk

    Chalk

  • MoistureWell-drained

  • SoilLoam, Sand, Chalk

  • pHNeutral, Acid, Alkaline

Size

  • 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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Ammi majus

bullwort

was £2.29 Buy from £1.83 at the RHS Plants Shop

was £2.29 Buy from £1.83 at the RHS Plants Shop

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