• 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

Fritillaria imperialis 'Maxima Lutea'

Crown imperial 'Maxima Lutea'

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
Crown imperial 'Maxima Lutea'

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  • Other common names Crown imperial 'Maxima Lutea'

  • Synonyms Fritillaria imperialis 'Lutea Maxima'

  • Genus Fritillaria are bulbous herbaceous perennials with lance-shaped or linear leaves and nodding bell-shaped or bowl-shaped flowers that may be solitary or in racemes or umbels

  • Family Liliaceae / Liliaceae

  • Species 'Maxima Lutea' is a bulbous perennial to 1.5m in height, the erect stems bearing whorls of narrow pale green leaves, and with 2-5 nodding, bell-shaped bright yellow flowers 5cm in length borne in a terminal cluster in early summer

Characteristics

  • Foliage Deciduous

  • Habit Clump-forming

  • 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)
    Old hardiness ratings

    While we update our systems with the new hardiness ratings you may still see old hardiness ratings in your search results. These are denoted as 'Old'.

    • H1 - Requires heated glass
    • H2 - Requires unheated glass
    • H3 - Hardy outside in some regions of the UK
    • H4 - Hardy throughout the UK
    • H1 + H3 - Requires heated glass but may be grown outside in summer

    For full details of the hardiness ratings see

    see more

    H6

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Exposed or Sheltered

Soil

  • Chalk

    Sand

  • Chalk

    Chalk

  • Chalk

    Loam

  • MoistureWell-drained

  • SoilSand, Chalk, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height

    1-1.5 metres

  • Ultimate spread

    0.1-0.5 metres

  • Time to ultimate height

    2-5 years

How to grow

Cultivation Grows well in most fertile, humus-rich, well-drained soils and prefers cool, moist summers. Handle the fragile bulbs carefully and plant at four times own depth

Propagation Propagate by seed sown in containers in a cold frame in autumn. Needs exposure to winter cold for germination in spring. Propagate by division of offsets in late summer

Suggested planting locations and garden types Flower borders and beds Architectural City & Courtyard Gardens Cottage & Informal Garden

How to care

Pruning No pruning required

Pests Susceptible to damage by slugs and lily beetle

Diseases Generally disease free

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