• 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

Hemerocallis lilioasphodelus

yellow day lily

yellow day lily

© � RHS 2002

  • Other common names yellow day lily

  • Synonyms Hemerocallis flava
    Hemerocallis 'Lilioasphodelus'

  • Genus Hemerocallis may be evergreen or herbaceous perennials, with narrow, strap-shaped leaves and funnel-shaped flowers on erect stems in late spring or early summer

  • Family Hemerocallidaceae / Hemerocallidaceae

  • Details H. lilioasphodelus is a spreading rhizomatous perennial to 80cm in height, with narrow leaves and fragrant, lily-shaped light yellow flowers 8-9cm in width

  • Plant range Europe Asia


  • Foliage Semi-evergreen

  • Habit Spreading / Branched

  • Fragrance Flower



  • Full Sun

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

  • Exposure Exposed or Sheltered


  • Chalk


  • Chalk


  • Chalk


  • MoistureMoist but well-drained, Poorly-drained

  • SoilClay, Loam, Chalk

  • pHAcid, Alkaline, Neutral


  • 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 a fertile, moist but well-drained soil preferably in full sun. Copes well with heavy clay. May need watering in spring to early summer in dry conditions to ensure flowering

Propagation Propagate by division in spring or autumn; evergreen plants are best divided in spring

Suggested planting locations and garden types Flower borders and beds Low Maintenance Cottage & Informal Garden Prairie Planting Coastal

How to care

Pruning Remove spent flowers and remove dead foliage as required.

Pests Can get aphids and hemerocallis gall midge

Diseases May be affected by a leaf spot

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