• 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

Abeliophyllum distichum Roseum Group

white forsythia 'Roseum'

  • Other common names white forsythia 'Roseum'

  • Family Oleaceae

  • Genus Abeliophyllum are lax, deciduous shrubs with paired ovate leaves and axillary racemes of fragrant flowers with 4 oblong lobes, borne on the bare stems in late winter or early spring

  • Details Roseum Group is a deciduous shrub of open growth, with small oval leaves and 4-petalled pale pink flowers borne in racemes in the leaf axils in late winter and early spring

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)

    H6

Colour

Sunlight

  • Full Sun

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

  • Exposure Sheltered

Soil

  • Sand

    Sand

  • Chalk

    Chalk

  • Loam

    Loam

  • MoistureWell-drained

  • SoilSand, Chalk, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 1-1.5 metres

  • Ultimate spread 1-1.5 metres

  • Time to ultimate height 10-20 years

How to grow

Cultivation Grow in fertile, well-drained soil in full sun. Ideal for wall-training on a warm wall; early flowers may be damaged by late frosts

Propagation Root softwood or semi-ripe cuttings in spring and early summer, or propagate by layering in early spring

Suggested planting locations and garden types Wall-side Borders City & Courtyard Gardens

How to care

Pruning Pruning group 5 or pruning group 13 if wall-trained

Pests Generally trouble free

Diseases Generally trouble free

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

Get involved

We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.