Overview
Trillium grandiflorum 'Roseum' is a herbaceous perennial in the genus Trillium, part of the Melanthiaceae family. It typically grows around 0.4 m tall. Trillium grandiflorum 'Roseum' grows best in full sun and full shade, and tolerates most soils. Its UK hardiness is rated H7. It is native to USA.
About
Trillium grandiflorum 'Roseum' is an herbaceous perennial in the Melanthiaceae valued for its rose-coloured flowers. Plants form low clumps to about 0.4 m in height and flower in April to May. It tolerates a wide light range from full sun to full shade and prefers moist but well-drained soils.
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 'Roseum' is a herbaceous perennial from the genus Trillium, native to the USA, and placed in the Melanthiaceae family. Its defining feature is the cultivar's rose-coloured flowers, produced in a concentrated period each year in April to May, and the plant normally remains compact at around 0.4 m tall. For cultivation choose a site that supplies consistent moisture without waterlogging; acceptable soil textures include sandy, loamy or clay soils provided they drain. The plant will tolerate full sun through to full shade, so it can be placed in brighter or shadier parts of the garden; it is fully hardy to H7 (roughly USDA zones 4–9), so it withstands normal UK winter conditions. Use Trillium grandiflorum 'Roseum' where a low spring-flowering accent is wanted — for example in shaded borders or cooler, sheltered spots where the soil stays moist. Expect compact clumps and reliable April–May flowering at about 0.4 m high as the main seasonal feature.
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 'Roseum' size, habit and characteristics
- Plant type
- Herbaceous perennial
- Height
- 0.4 m
- Native to
- USA
Frequently asked questions
Where is the best place to plant Trillium grandiflorum 'Roseum'?
Trillium grandiflorum 'Roseum' prefers full sun and full shade.
What soil does Trillium grandiflorum 'Roseum' need?
Trillium grandiflorum 'Roseum' 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 'Roseum' grow?
Trillium grandiflorum 'Roseum' reaches a height of 0.4 m.
Is Trillium grandiflorum 'Roseum' hardy in the UK?
Trillium grandiflorum 'Roseum' has an RHS hardiness rating of H7, meaning it is fully hardy throughout the UK, tolerating temperatures below -20°C.
