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Herbaceous Perennial

Trillium ovatum

A clump-forming perennial, to around 50cm high, with upright, reddish stems each bearing three diamond-shaped, deeply veined dark green leaves. Fragrant white flowers, with spreading, curved back petals that age to reddish-pink, are held on short stems above the leaves in spring

Synonyms
Trillium californicum

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Size
Ultimate height
0.1–0.5 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Clay
Loam
Moisture
Moist but well–drained
pH
Acid, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring White Pink Green
Summer
Autumn
Winter
Position
  • Full shade
  • Partial shade
Aspect

East–facing or North–facing or West–facing

Exposure
Sheltered
Hardiness
H5
Botanical details
Family
Melanthiaceae
Native to the UK
No
Foliage
Deciduous
Habit
Clump forming, Columnar upright
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

Plant range
Western N America

How to grow

Cultivation

Thrives in moist but well drained, humus rich, neutral to slightly 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
  • Low Maintenance
  • 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

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