Tricyrtis formosana Stolonifera Group

RHS Plant Profile

toad lily Stolonifera Group

Synonyms

Tricyrtis formosana var. stolonifera, Tricyrtis stolonifera

Herbaceous Perennial

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Stolonifera Group grows strongly to 90cm if in the right conditions. It spreads by networks of stolons and is useful for its late flowering time, in autumn. Flowers are white with deep purple spots, appearing in clusters on upright stems.

Position

Full shade, Partial shade

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.1-0.5 metres
Max Height: 0.5-1 metres

Growing Conditions

Chalk Loam Sand

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

Position

Full shade Partial shade

Aspect: West–facing or North–facing or East–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): H5

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: Accepted
Plant Range: Taiwan

How to Grow

Cultivation

Grow in moist but well-drained, humus-rich soil in deep or partial shade. In cold areas, a sheltered position encourages flowers before the first frosts. May need a deep winter mulch in areas where prolonged cold is not accompanied by snow cover

Propagation

Propagate by seed in pots in a cold frame as soon as seed is ripe or in autumn. Propagate by division in early spring

Suggested planting locations and garden types

Flower borders and beds
Underplanting of roses and shrubs

Pruning

Remove faded flowerheads

Pests

May be susceptible to slugs and snails

Diseases

Generally disease-free