Hesperantha coccinea f. alba

RHS Plant Profile

crimson flag lily (white form)

Synonyms

Hesperantha coccinea f. alba, Schizostylis alba, Schizostylis coccinea f. alba

Herbaceous Perennial

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A vigorous, clump-forming perennial that grows from thickened rhizome roots. In autumn it produces white star-shaped flowers above thin, grass-like, semi-evergreen leaves.

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

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

Growing Conditions

Chalk Clay Loam Sand

Moisture: Moist but well–drained
pH: Acid or Neutral or Alkaline

Position

Full sun

Aspect: East–facing or 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): H4

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Iridaceae
Native to GB/Ireland: No
Foliage: Semi evergreen
Habit: Clump forming
Genus: Hesperantha are semi-evergreen, rhizomatous perennials with narrowly sword-shaped, erect leaves and spikes of starry or bowl-shaped flowers from late summer to late autumn
Name Status: Synonym

How to Grow

Cultivation

Grow in moderately fertile, moist but well drained soil in full sun. Keep roots moist. Shelter from cold, drying winds. mulch with organic matter in winter.

Propagation

Propagate by seed at 13-16°C (55-61°F) in spring. Propagate by division in spring.

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Flower borders and beds

Pruning

No pruning required. Remove withered leaves and flower stems by hand.

Pests

Generally pest-free

Diseases

Generally disease-free