• 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

Astrantia major 'Ruby Wedding'

Masterwort 'Ruby Wedding'

Masterwort 'Ruby Wedding'

© � RHS

  • Other common names Masterwort 'Ruby Wedding'

  • Genus Astrantia are clump-forming herbaceous perennials with palmately lobed basal leaves and branched, erect, wiry stems bearing compact umbels of tiny flowers surrounded by a rosette of showy bracts

  • Family Apiaceae / Apiaceae

  • Species 'Ruby Wedding' is a perennial with a loose rosette of basal leaves and erect stems bearing deep purplish-red flower-heads in summer


  • Foliage Deciduous

  • Habit Clump-forming



  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered


  • Chalk


  • Chalk


  • Chalk


  • Chalk


  • MoistureMoist but well-drained, Poorly-drained

  • SoilLoam, Chalk, Sand, Clay

  • pHAcid, Alkaline, Neutral


  • Ultimate height

    0.5-1 metres

  • Ultimate spread

    0.1-0.5 metres

  • Time to ultimate height

    2-5 years

How to grow

Cultivation Best grown in moist, fertile, humus-rich soil in sun or partial shade but will tolerate drier conditions

Propagation Propagate by seed sown in pots in a cold frame as soon as seed is ripe or propagate by division in spring

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

How to care

Pruning Deadhead before seed is ripe to prevent self-seeding

Pests Generally pest free

Diseases Powdery mildews may be troublesome

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