• 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

Lobularia maritima 'Rosie O'Day'

sweet alyssum 'Rosie O'Day'

sweet alyssum 'Rosie O'Day'

© � RHS 1998

  • Other common names sweet alyssum 'Rosie O'Day'

  • Genus Lobularia can be annuals or perennials, of low spreading habit, with simple leaves and short terminal racemes of 4-petalled, fragrant flowers in summer

  • Family Brassicaceae / Brassicaceae

  • Details 'Rosie O'Day' is a spreading annual with rounded heads of small, fragrant flowers opening white and fading to rosy-pink with a yellow eye


  • Foliage Deciduous

  • Habit Bushy

  • Fragrance Flower



  • Full Sun

  • Aspect South-facing or East-facing

  • Exposure Sheltered or Exposed


  • Chalk


  • Chalk


  • MoistureWell-drained

  • SoilLoam, Sand

  • pHAcid, Neutral, Alkaline


  • Ultimate height

    Up to 10 cm

  • Ultimate spread

    0.1-0.5 metres

  • Time to ultimate height

    1-2 years

How to grow

Cultivation Grow in light, moderately fertile, well-drained soil in full sun. Clip over after flowering to encourage further blooms

Propagation Propagate by seed sown in situ in late spring

Suggested planting locations and garden types Flower borders and beds Garden Edging City & Courtyard Gardens Coastal Cottage & Informal Garden Patio & Container Plants

How to care

Pruning Cut back after flowering

Pests Slugs and flea beetles may be a problem

Diseases May be subject to a downy mildew, club root and white blister

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