Trillium catesbaei

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Synonyms

Trillium stylosum
Trillium nervosum

Herbaceous Perennial
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A slow-growing woodland perennial, to around 50cm high, with upright, red-tinted stems each bearing three oval-shaped, deeply veined green leaves. Nodding, pale or deep pink flowers with recurved petals are borne on short stems beneath and among the leaves in spring

Position

Full shade, Partial shade

Soil Types

Clay, Loam

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 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)
H4

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
Plant Range
SE USA

How to Grow

Cultivation

Thrives in moist but well drained, humus rich, neutral to slightly acidic soil in light shade, though will tolerate most soils and positions. 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