Lilium speciosum (IXb-c/d)

RHS Plant Profile
showy Japanese lily

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showy Japanese lily RHS

Other common names

showy lily, spotted lily, Japanese lily, orchid lily

Bulbs
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A vigorous, stem-rooting lily to 1.5m with erect, purple-flushed stems and scattered 18cm long leaves. In late summer and early autumn it produces sprays of up to 12 large, fragrant, turk's-cap flowers up to 18cm across pale pink or white, flushed darker pink in the centre and with dark pink spots

Position

Partial shade

Soil Types

Clay, Loam

Max Height

1-1.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
1-1.5 metres

Growing Conditions

Clay Loam
Moisture
Moist but well–drained or Poorly–drained
pH
Acid

Position

Partial shade
Aspect
East–facing or North–facing or West–facing
Exposure
Sheltered
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 & Scent

Fragrance Flower
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Liliaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Columnar upright
Potentially harmful
Ornamental bulbs - not to be eaten. Wear gloves and other protective equipment when handling. TOXIC to pets if eaten (cats) - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus
Lilium are bulbous perennials with erect stems bearing whorled or spirally arranged leaves and terminal racemes or umbels of bowl-shaped, trumpet-shaped, funnel-shaped or turks cap shaped flowers, often fragrant, and white, yellow, orange or red
Name Status
Correct
Horticultural Group

Horticultural Classification Codes

Horticultural Classification Codes are often given to genera which have a large number of species or cultivars. They are used to categorise cultivated plants based on specific, shared characteristics such as shape, colour, size or flowering time, and can be displayed as letters or numbers

For example:
Dahlia ‘Sunset Kate (Sin) = Single flower
Rosa ‘Marigold’ (HT) = Hybrid Tea

These include lily species and cultivars of lily species with outward and downward-facing flowers

How to Grow

Cultivation

Needs a moist, acid soil and partial shade

Propagation

Propagate by seed sown, when ripe, in containers in a cold frame or separate offsets after the foliage dies down

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Cut flowers
  • Flower borders and beds
  • Wall side borders

Pruning

No pruning required

Pests

May be susceptible to lily beetle, aphids, slugs, snails, Thrips, leatherjackets, and wireworms, and to damage by rabbits and voles; plants in containers may be susceptible to vine weevil

Diseases

May be susceptible to grey moulds and a virus; see lily diseases