• AGM plants

    AGM plants have been through a rigourous 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 subsp. glauca

Glaucous evening primrose

Glaucous evening primrose

© � RHS

  • Other common names Glaucous evening primrose

  • 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

  • Family Onagraceae / Onagraceae

  • Species O. fruticosa subsp. glauca is an herbaceous perennial to 80cm, with erect stems bearing smooth, ovate, glaucous leaves, reddish when young, and terminal racemes of light yellow flowers 3-5cm wide from late spring to late summer

  • Plant range E N America


  • Foliage Deciduous

  • Habit Bushy



  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Exposed or Sheltered


  • Chalk


  • Chalk


  • Chalk


  • MoistureWell-drained

  • SoilSand, Chalk, Loam

  • pHAlkaline, Neutral


  • Ultimate height

    0.5-1 metres

  • Ultimate spread

    0.1-0.5 metres

  • Time to ultimate height

    2-5 years

How to grow

Cultivation Grow in moderately fertile well-drained soil in full sun

Propagation Propagate by division in early spring or after flowering in late summer

Suggested planting locations and garden types Flower borders and beds Low Maintenance Wall-side Borders Drought Resistant Cottage & Informal Garden Coastal Mediterranean Climate Plants

How to care

Pruning Cut back after flowering

Pests Slugs and snails may be a problem

Diseases Leaf spot and powdery mildew may be a problem

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