Trillium undulatum

RHS Plant Profile
painted trillium
painted trillium visionspictures.com

Other common names

painted trillium, painted wood lily, wild pepper

Herbaceous Perennial

A clump-forming perennial, up to 60cm high, with upright stems each bearing three oval-shaped, dark green leaves that are flushed with reddish-bronze when young. Flowers are white with red markings at the base, with spreading, curved back petals with wavy edges, and are held on short stems above the leaves in spring

Position

Full shade, Partial shade

Soil Types

Clay, Loam

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

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
H6

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Melanthiaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Clump forming
Genus
Trillium are rhizomatous, herbaceous perennials with erect stems bearing a whorl of ovate or diamond-shaped leaves, with one or more erect or nodding flowers borne at the stem apex
Name Status
Correct

How to Grow

Cultivation

Thrives in deep, humus rich, acidic soil in light shade. mulch annually in autumn, ideally with leaf mould. Ideal for woodland, or underplanting where they will not be overwhelmed by other plants. See trillium cultivation

Propagation

Propagate by seed, sown in pots in a shady cold frame as soon as seed is ripe; may take several years to reach flowering size. Propagate by division of rhizomes (root cuttings) after flowering

Suggested planting locations and garden types

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

Pruning

No pruning required

Pests

May be susceptible to aphids, slugs and snails

Diseases

Generally disease-free