• 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

Digitalis grandiflora

large yellow foxglove

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
  • Other common names large yellow foxglove
    cream-coloured foxglove

    great yellow foxglove
    large-flowered foxglove
    yellow foxglove

    see more
  • Synonyms Digitalis ambigua
    Digitalis orientalis

    Digitalis macrantha

    see more
  • Family Plantaginaceae

  • Genus Digitalis can be biennials or usually short-lived perennials forming a rosette of simple leaves with bell-shaped flowers in slender, erect, usually one-sided racemes

  • Details D. grandiflora is a clump-forming perennial to 80cm in height, with dark, evergreen foliage and erect spires of tubular, creamy-yellow flowers 4-5cm in length

  • Plant range Europe

Characteristics

  • Foliage Evergreen

  • Habit Clump-forming

  • Toxicity Highly toxic by ingestion

  • 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

  • Partial Shade

  • Full Sun

  • Full Shade

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

  • Exposure Sheltered

Soil

  • Clay

    Clay

  • Loam

    Loam

  • Sand

    Sand

  • Chalk

    Chalk

  • MoistureWell-drained, Moist but well-drained

  • SoilClay, Loam, Sand, Chalk

  • pHAlkaline, Acid, Neutral

Size

  • Ultimate height 0.5-1 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Will grow in almost any soil or situation except very wet or very dry; ideal site is a humus-rich soil in partial shade.

Propagation Propagate by seed sown in pots in a cold frame in late spring or propagate by division in early spring

Suggested planting locations and garden types Flower borders and beds Cottage & Informal Garden

How to care

Pruning Cut back main flower spike as it fades to encourage the growth of flowering side shoots

Pests Can get aphids and leaf and bud eelworm

Diseases May be affected by leaf spots and powdery mildews

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