• 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

Dianthus barbatus

sweet william

sweet william

© RHS

  • Other common names sweet william
    bearded pink

    bloomy down
    London pride
    London tufts
    oeillet des poètes
    tolmeiner

    see more
  • Family Caryophyllaceae

  • Genus Dianthus can be annuals, evergreen perennials or subshrubs with narrow, often greyish leaves and showy flowers that are frequently fragrant

  • Details D. barbatus is a biennial or short-lived perennial with prostrate rosettes of wide, lanceolate green leaves and stiff, erect stems, thickened at the nodes, to 40-60cm tall, bearing many-flowered, terminal, flattened heads. Flowers come in many colours from white to darkest red, often in bicolour combinations, with the darker eyes and toothed petals characteristic of pinks and carnations. Many named selections exist

  • Plant range S Europe

Characteristics

  • Foliage Evergreen

  • Habit Bushy

  • Fragrance Flower

  • 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 or East-facing or West-facing

  • Exposure Sheltered

Soil

  • Sand

    Sand

  • Loam

    Loam

  • MoistureWell-drained

  • SoilSand, Loam

  • pHAlkaline, Neutral

Size

  • Ultimate height 0.1-0.5 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 1-2 years

How to grow

Cultivation Grow in a well-drained neutral to slightly acid soil in full sun

Propagation Propagate by seed sown in late spring and plant out into flowering positions in the autumn

Suggested planting locations and garden types Flower borders and beds Cut Flowers Cottage & Informal Garden

How to care

Pruning Deadhead as required

Pests Can get aphids, slugs and caterpillars

Diseases May be affected by a rust

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