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Herbaceous PerennialBulbs

Dierama insigne

A slow-growing evergreen perennial, with fine clumps of narrow, grass-like leaves. From mid to late summer, produces slender, wiry stems bearing a succession of pendent, tubular to bell-shaped, light pink to magenta pink flowers, with firm (not papery) bracts

Synonyms

Dierama riparia

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Ultimate height

1–1.5 metres

Time to ultimate height

2–5 years

Ultimate spread

0.1–0.5 metres

Chalk

Loam

Sand

Moisture

Moist but well–drained, Well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

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 the UK: No
Foliage: Evergreen
Habit: Tufted, Clump forming
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: S Africa (Natal, Transvaal)

How to grow

Cultivation

Grow in humus-rich, well drained soil in an open, sunny spot; these plants like moisture during the growing season but dislike winter wet. Add a compost mulch in spring. May benefit from winter protection in colder areas. See dierama cultivation for more detailed advice

Propagation

Propagate by seed in containers in a cold frame as soon as ripe, or by division of mature clumps, carefully separating corms in spring. Plants from seed may vary; young plants and divisions can be slow to establish

Suggested planting locations and garden types

City and courtyard gardens
Coastal
Cottage and informal garden
Gravel garden
Prairie planting
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

Get involved

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