• 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

Oenothera fruticosa 'Fyrverkeri'

evening primrose 'Fyrverkeri'

evening primrose 'Fyrverkeri'

© RHS 2002

  • Other common names evening primrose 'Fyrverkeri'

  • Synonyms Oenothera fruticosa FIREWORKS
    Oenothera fruticosa 'Fireworks'

    Oenothera tetragona 'Fireworks'

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  • Family Onagraceae

  • Genus Oenothera can be annuals, biennials or perennials, upright or spreading in habit, with simple or lobed leaves and bowl-shaped, white, yellow or pink flowers over a long period in summer

  • Details 'Fyrverkeri' is an erect herbaceous perennial to 50cm in height, with lance-shaped bronze-tinted leaves on purplish stems. Terminal racemes of bright yellow flowers 5cm in width open from reddish buds

Characteristics

  • Foliage Deciduous

  • Habit Columnar/Upright

  • 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

  • Aspect South-facing

  • Exposure Exposed or Sheltered

Soil

  • Sand

    Sand

  • Loam

    Loam

  • Chalk

    Chalk

  • MoistureWell-drained

  • SoilSand, Loam, Chalk

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 0.5-1 metres

  • Ultimate spread 0.5-1 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow in moderately fertile soil that is well-drained, ideal for stony sites in full sun as drought-tolerant

Propagation Propagate by division in early spring or autumn. Propagate by softwood cuttings of non-flowering shoots from late spring to midsummer

Suggested planting locations and garden types Drought Resistant Flower borders and beds Cottage & Informal Garden Gravel Garden Wildlife Gardens Rock Garden

How to care

Pruning Cut back after flowering

Pests Generally pest free

Diseases May be subject to powdery mildews and a leaf spot

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