• 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

Hamamelis × intermedia 'Diane'

witch hazel 'Diane'

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
witch hazel 'Diane'

© RHS 2001

  • Other common names witch hazel 'Diane'

  • Synonyms Hamamelis × intermedia 'New Red'

  • Family Hamamelidaceae

  • Genus Hamamelis are deciduous shrubs with broadly ovate or rounded leaves, sometimes colouring well in autumn, and fragrant yellow to red flowers with 4 narrow petals, borne on the leafless branches in late winter and early spring, or in autumn

  • Details 'Diane' is a broad-crowned, large deciduous shrub of open habit, with broadly oval leaves turning red and yellow in autumn, and deep orange-red flowers in mid and late winter

Characteristics

  • Foliage Deciduous

  • 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)

    H5

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered

Soil

  • Chalk

    Sand

  • Chalk

    Clay

  • Chalk

    Loam

  • MoistureWell-drained, Moist but well-drained

  • SoilSand, Clay, Loam

  • pHAcid, Neutral

Size

  • Ultimate height 2.5-4 metres

  • Ultimate spread 2.5-4 metres

  • Time to ultimate height 10-20 years

How to grow

Cultivation Easy to grow in an open but unexposed site. Will tolerate deep, humus-rich soils over chalk

Propagation Propagate by simple layering of suitable shoots in spring, by grafting in late winter or by chip budding in late summer

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

How to care

Pruning Pruning group 1

Pests Generally pest free

Diseases Coral spot and honey fungus may be a problem

Advertise here

Did you find the information you were looking for?

RHS members can get exclusive individual advice from the RHS Gardening Advice team.

Join the RHS now