Overview
Trillium grandiflorum 'Flore Pleno' is a perennial in the genus Trillium, part of the Melanthiaceae family. It typically grows around 0.4 m tall. Trillium grandiflorum 'Flore Pleno' grows best in full sun and full shade, and tolerates most soils. Its UK hardiness is rated H7. It is native to Nova Scotia, Ontario and Quebec.
About
Trillium grandiflorum 'Flore Pleno' is a perennial woodland plant that produces conspicuous white flowers in April to May and reaches about 0.4 m. It prefers moist but well-drained soils across sandy, loamy or clay types and tolerates full sun to full shade. Fully hardy in the UK (H7), it is native to Nova Scotia, Ontario and Quebec. Plant in locations where summer soil moisture remains reliable.
Wikipedia contributors, CC BY-SA 4.0 — Trillium grandiflorum
About the genus
Trillium is a genus of about fifty flowering plant species in the family Melanthiaceae. Trillium species are native to temperate regions of North America and Asia, with the greatest diversity of species found in the southern Appalachian Mountains in the southeastern United States.
Wikipedia contributors, "Trillium", CC BY-SA 4.0 — Trillium
In the garden
Trillium grandiflorum 'Flore Pleno' is a perennial in the Melanthiaceae family, native to Nova Scotia, Ontario and Quebec. It typically grows to around 0.4 m and flowers in April to May, producing white blooms that are best assessed during that brief season. The cultivar name identifies this particular form within the species but does not alter basic site requirements. Give it a spot with reliable moisture: soils that remain moist but are well-drained suit this plant, and it will grow in sandy, loamy or clay soils. Light levels are flexible — it tolerates full sun through to full shade — so match planting position to how wet and cool the soil remains in summer. In the UK H7 hardiness means you can leave it planted outdoors year-round; the USDA range of 4–9 indicates similar cold tolerance for those in applicable regions. Use Trillium grandiflorum 'Flore Pleno' where a spring floral note of white is wanted at around 0.4 m height — for example in a shaded border margin, a sheltered planting beneath deciduous trees, or a perennial bed where soil stays cool. Keep mulch to conserve moisture through drier spells but avoid waterlogging. Note the April–May flowering window when planning companion plants so the bloom is visible rather than obscured by later, taller growth.
Growing conditions
Best soil and position for Trillium
- Sunlight
- Full sun, Full shade
- Soil type
- Sandy, Loamy, Clay
- Soil moisture
- Moist but well-drained
- UK hardiness
- H7
Plant details
Trillium grandiflorum 'Flore Pleno' size, habit and characteristics
- Plant type
- Perennial
- Height
- 0.4 m
- Native to
- Nova Scotia, Ontario, Quebec
Care notes
Pruning and caring for Trillium grandiflorum 'Flore Pleno'
- Propagation
- Seed, Division
Frequently asked questions
Where is the best place to plant Trillium grandiflorum 'Flore Pleno'?
Trillium grandiflorum 'Flore Pleno' prefers full sun and full shade.
What soil does Trillium grandiflorum 'Flore Pleno' need?
Trillium grandiflorum 'Flore Pleno' is adaptable and grows happily in most soil types, including sandy, loamy and clay. Aim for soil that stays moist but well-drained.
How big does Trillium grandiflorum 'Flore Pleno' grow?
Trillium grandiflorum 'Flore Pleno' reaches a height of 0.4 m.
Is Trillium grandiflorum 'Flore Pleno' hardy in the UK?
Trillium grandiflorum 'Flore Pleno' has an RHS hardiness rating of H7, meaning it is fully hardy throughout the UK, tolerating temperatures below -20°C.
How do I propagate Trillium grandiflorum 'Flore Pleno'?
Seed, Division.
