Tricyrtis 'Blue Wonder'

RHS Plant Profile

toad lily 'Blue Wonder'

Herbaceous Perennial

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A clump-forming perennial to around 60cm high, with upright stems bearing alternate, ovate green leaves with deeply impressed veins. Star-shaped white flowers, heavily spotted with violet-blue and with showy central stamens, are produced in the upper leaf axils and at the tips of the stems from late summer into autumn

Position

Full shade, Partial shade

Soil Types

Clay, Loam

Max Height

0.5-1 metres

Max Spread

0.5-1 metres

Size

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

Growing Conditions

Clay Loam

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

Position

Full shade Partial shade

Aspect: East–facing or North–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): H6

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Liliaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Clump forming
Genus: Tricyrtis are rhizomatous perennials, sometimes stoloniferous, with erect or arching stems with alternate, sometimes 2-ranked leaves and star-shaped or bell-shaped flowers that may be solitary or in terminal or axillary clusters
Name Status: Unresolved

How to Grow

Cultivation

Grow in moisture-retentive but well-drained, humus-rich soil in a sheltered, shady site; suitable for a woodland garden or shade border. Mulch well in winter. Plants are often late to emerge in spring

Propagation

Propagate by division of established clumps in early spring

Suggested planting locations and garden types

Cottage and informal garden
Flower borders and beds
Underplanting of roses and shrubs

Pruning

No pruning required, but faded flower stems can be cut back

Pests

May be susceptible to aphids, slugs and snails

Diseases

May be susceptible to virus diseases