• 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

Hydrangea involucrata 'Hortensis' (d)

Hydrangea 'Hortensis'

Hydrangea 'Hortensis'

© � RHS 2002

  • Other common names Hydrangea 'Hortensis'

  • Genus Hydrangea can be deciduous or evergreen shrubs, or self-clinging climbers, with flowers in clusters usually comprising both small fertile and more showy sterile flowers; often good autumn colour

  • Family Hydrangeaceae / Hydrangeaceae

  • Species 'Hortensis' is a small deciduous shrub with broadly ovate leaves. Flowers numerous, all sterile, double, creamy-white or pinkish in sun, in clusters, in late summer

Characteristics

  • Foliage Deciduous

  • Habit Bushy

  • Toxicity May cause mild stomach upset if ingested

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered or Exposed

Soil

  • Chalk

    Loam

  • Chalk

    Clay

  • Chalk

    Sand

  • MoistureWell-drained, Moist but well-drained

  • SoilLoam, Clay, Sand

  • pHAcid, Neutral

Size

  • Ultimate height

    0.5-1 metres

  • Ultimate spread

    1-1.5 metres

  • Time to ultimate height

    5-10 years

How to grow

Cultivation Grow in moist but well-drained soil in sun or partial shade

Propagation Propagate by softwood cuttings

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

How to care

Pruning Pruning group 1

Pests Can get aphids, capsid bug, glasshouse red spider mite and hydrangea scale

Diseases Generally disease free

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