• 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

Wisteria × formosa

beautiful wisteria

  • Other common names beautiful wisteria

  • Family Fabaceae

  • Genus Wisteria are vigorous woody climbers with twining stems bearing pinnate leaves and long pendulous racemes of fragrant pea-like flowers in spring and early summer

  • Details Wisteria x formosa is a vigorous, deciduous, twining cultivar. Highly scented, pea-like, pale to mid-purple flowers are produced on short trusses about 20cm long, in early summer

Characteristics

  • Foliage Deciduous

  • Habit Climbing

  • Fragrance Flower

  • 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)

    H6

Colour

Sunlight

  • Full Sun

  • Partial Shade

  • Aspect South-facing or West-facing

  • Exposure Sheltered

Soil

  • Sand

    Sand

  • Clay

    Clay

  • Chalk

    Chalk

  • Loam

    Loam

  • MoistureMoist but well-drained

  • SoilSand, Clay, Chalk, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 8-12 metres

  • Ultimate spread wider than 8 metres

  • Time to ultimate height 10-20 years

How to grow

Cultivation Grow in a fertile, moist, well-drained soil in sun or semi shade. May be trained into a large tree, on a wall, arch or pergola, or as a free-standing half standard. See wisteria cultivation for more advice

Propagation Propagate by layering, softwood cuttings, hardwood cuttings or grafting

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

How to care

Pruning Pruning wisteria

Pests Can get scale insects including wisteria scale

Diseases May be affected by a leaf spot and powdery mildews

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