Lilium superbum (IXc/d) | Turk's cap lily

RHS

Other common names

great American Turk's cap lily, swamp lily, Turk's head lily

Bulbs

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A vigorous stem-rooting lily with purple-mottled green stems and linear bright green leaves; in late summer and early autumn it produces long racemes of up to 40 pendent turkscap flowers, to 7cm across, with red-flushed orange tepals, green towards the bases and spotted maroon

Position

Full sun, Partial shade

Soil Types

Loam, Sand

Max Height

1.5-2.5 metres

Max Spread

0.5-1 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.5-1 metres
Max Height: 1.5-2.5 metres

Growing Conditions

Loam Sand

Moisture: Well–drained
pH: Acid or Neutral

Position

Full sun Partial shade

Aspect: South–facing or West–facing or East–facing
Exposure: Exposed or 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

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 downward-facing flowers
Plant Range: E United States

How to Grow

Cultivation

Grow in neutral to acid well-drained soil enriched with leaf mould or well-rotted organic matter

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

Patio and container plants
City and courtyard gardens
Coastal
Wildflower meadow
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

Grey moulds and a virus may cause problems, see lily diseases