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BulbsHerbaceous Perennial

Dierama ambiguum

A cormous perennial with long, narrow, evergreen leaves. The rich pink, hanging, bell-shaped, flowers are carried in mid- to late summer on wiry, arching stems about 80cm tall

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Ultimate height

0.5–1 metres

Time to ultimate height

2–5 years

Ultimate spread

0.5–1 metres

Chalk

Loam

Sand

Moisture

Well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

South–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)

Botanical details

Family: Iridaceae
Native to GB / Ireland: No
Foliage: Evergreen
Habit: Bushy
Genus: Dierama are evergreen, clump-forming cormous perennials with long, narrow leaves and slender arching stems bearing nodding, bell-shaped flowers in summer
Name status: Correct
Plant range: South Africa (Kwazulu, Natal, E. Cape

How to grow

Cultivation

Grow in humus-rich, well-drained soil in a sheltered situation with full sun

Propagation

Propagate by seed in containers in a cold frame as soon as ripe, or by division of well-established clumps in spring. Do not allow the corms to dry out. They may take one or two years to flower freely again

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Coastal
Gravel garden
Banks and slopes
Flower borders and beds

Pruning

Tidy any winter-damaged foliage by cutting to the base in spring

Pests

Generally pest-free

Diseases

Generally disease-free

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