• 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

Polygonatum × hybridum

Solomon's seal

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
  • Other common names Solomon's seal
    garden Solomon's seal

  • Synonyms Polygonatum multiflorum misapplied

  • Family Asparagaceae

  • Genus Polygonatum are rhizomatous herbaceous perennials with erect or arching stems bearing glossy, elliptic leaves and pendent, tubular or bell-shaped flowers, sometimes followed by black or red berries

  • Details P. × hybridum is a perennial with slightly arching stems to 1.2m, bearing ovate leaves and small axillary clusters of nodding, tubular creamy-white flowers tipped with green, appearing in late spring, and followed by black berries

Characteristics

  • Foliage Deciduous

  • Habit Spreading / Branched

  • Toxicity All parts may cause severe discomfort if ingested

  • 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

  • Partial Shade

  • Full Shade

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

  • Exposure Sheltered

Soil

  • Chalk

    Clay

  • Chalk

    Loam

  • Chalk

    Chalk

  • Chalk

    Sand

  • MoistureMoist but well-drained

  • SoilClay, Loam, Chalk, Sand

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 1-1.5 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow in any fertile, humus-rich, moist but well-drained soil in full sun, partial shade or shade

Propagation Propagate by division in spring taking care not to damage young brittle shoots

Suggested planting locations and garden types Flower borders and beds Cut Flowers Underplanting of Roses and Shrubs

How to care

Pruning Cut back to the base in late autumn

Pests May be attacked by slugs and sawflies

Diseases Generally disease free

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