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Gladiolus flanaganii

suicide lily

A cormous perennial, to about 30cm tall, with upright, sword-shaped leaves and arching sprays of funnel-shaped flowers in mid- to late summer. These may be bright red, or paler red with darker markings and narrow white streaks on the lower petals

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Ultimate height

0.1–0.5 metres

Time to ultimate height

2–5 years

Ultimate spread

0–0.1 metre

Chalk

Loam

Sand

Moisture

Well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

West–facing or South–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)

Botanical details

Family: Iridaceae
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. Pets: Harmful if eaten. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus: Gladiolus are cormous perennials with fans of sword-shaped or linear leaves and spikes of funnel-shaped flowers
Name status: Correct
Plant range: Central & SE South Africa

How to grow

Cultivation

Grow in very well-drained soil, or pots of free-draining compost, in a sunny, sheltered position

Propagation

Propagate by seed or by separating cormlets when dormant

Suggested planting locations and garden types

Cottage and informal garden
Gravel garden
Patio and container plants
Cut flowers
Flower borders and beds

Pruning

No pruning required

Pests

May be susceptible to gladiolus thrip, aphids and slugs

Diseases

May be susceptible to gladiolus corm rot, grey moulds (Botrytis), Fusarium bulb rot, gladiolus core rot, gladiolus dry rot, gladiolus scab and neck rot, fungal leaf spot, and virus diseases

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