• 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

Robinia pseudoacacia 'Frisia'

false acacia 'Frisia'

false acacia 'Frisia'

© RHS 2002

  • Other common names false acacia 'Frisia'

  • Family Papilionaceae

  • Genus Robinia are vigorous suckering trees and shrubs, sometimes thorny, with pinnate leaves and racemes of pea-type flowers in early summer, sometimes followed by seed pods

  • Details 'Frisia' is a bushy medium-sized deciduous tree with bright golden-yellow, pinnate leaves, which become vivid greenish-yellow in summer, orange-yellow in autumn. Seldom flowers freely

Characteristics

  • Foliage Deciduous

  • Habit Bushy

  • 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

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

  • Exposure Sheltered

Soil

  • Loam

    Loam

  • Sand

    Sand

  • Clay

    Clay

  • Chalk

    Chalk

  • MoistureWell-drained, Moist but well-drained

  • SoilLoam, Sand, Clay, Chalk

  • pHAcid, Neutral, Alkaline

Size

  • Ultimate height Higher than 12 metres

  • Ultimate spread 4-8 metres

  • Time to ultimate height 20-50 years

How to grow

Cultivation Grow in moderately fertile soil; will tolerate poor dry soils. Larger trees develop brittle branches and suckering may be a problem; it has the potential to become a nuisance

Propagation Propagate by seed sown in a cold frame in autumn

Suggested planting locations and garden types Drought Resistant Low Maintenance

How to care

Pruning Pruning group 1 or Pruning group 7; pruning should be done in late summer or early autumn to prevent bleeding; sucker removal if necessary, in autumn

Pests Generally pest free

Diseases Generally disease free but in more recent years there have been Frisia dieback problems

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