Overview
Trillium erectum is a perennial herbaceous in the genus Trillium, part of the Melanthiaceae family. It typically grows around 0.4 m tall. Trillium erectum grows best in full sun and full shade, and tolerates most soils and acidic and neutral pH. Its UK hardiness is rated H7. Suggested uses include woodland gardens, shade gardens and naturalizing. It is native to E North America.
About
Trillium erectum is a perennial herbaceous plant in the Melanthiaceae, noted for its musky-scented spring flowers. It grows to about 0.4 m and flowers in the UK from April to May. It suits shaded or part-shade positions and prefers moist but well-drained soil with an acidic to neutral pH. All parts of the plant are toxic if ingested.
Wikipedia contributors, CC BY-SA 4.0 — Trillium erectum
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 erectum originates from eastern North America and is a perennial herbaceous member of the Melanthiaceae. In the UK it reliably produces its flowering display in April to May and reaches roughly 0.4 m in height. The flowers have an unpleasant, musky odour that can be noticeable at close range. Site the plant where it will be sheltered from harsh exposure and where soil remains moist but drains freely; it tolerates sandy, loamy or clay soils provided the pH is acidic to neutral. Light levels recorded for this species span full sun to full shade, but the recommended aspect is shaded to part shade. In British hardiness terms it is rated H7 (fully hardy) and corresponds to USDA zones 4–9, so it can withstand the coldest UK conditions where the site is appropriate. Use Trillium erectum in woodland or shade gardens and when naturalising under deciduous canopy. Note the fragrance and the plant’s toxicity: the scent is a conspicuous characteristic while the whole plant should not be eaten, so avoid planting where curious children or pets might nibble the foliage or flowers.
Growing conditions
Best soil and position for Trillium
- Sunlight
- Full sun, Full shade
- Soil type
- Sandy, Loamy, Clay
- Soil pH
- Acidic, Neutral
- Soil moisture
- Moist but well-drained
- Aspect
- Shaded, Part shade
- Exposure
- Sheltered
- UK hardiness
- H7
Plant details
Trillium erectum size, habit and characteristics
- Plant type
- Perennial herbaceous
- Height
- 0.4 m
- Suggested uses
- Woodland gardens, Shade gardens, Naturalizing
- Native to
- E North America
- Fragrance
- Unpleasant, musky odor
- Toxicity
- Toxic if ingested
Care notes
Pruning and caring for Trillium erectum
- Cultivation
- Prefers rich, moist, well-drained soil in shaded or partially shaded locations; avoid waterlogged conditions
- Pruning
- Remove dead foliage after flowering to tidy the plant
- Propagation
- By seed or division of rhizomes in autumn or early spring
Frequently asked questions
How do I grow Trillium erectum?
Prefers rich, moist, well-drained soil in shaded or partially shaded locations; avoid waterlogged conditions.
Where is the best place to plant Trillium erectum?
Trillium erectum prefers full sun and full shade. It suits sheltered positions.
What soil does Trillium erectum need?
Trillium erectum is adaptable and grows happily in most soil types, including sandy, loamy and clay. It prefers acidic and neutral soil. Aim for soil that stays moist but well-drained.
How do I prune Trillium erectum?
Remove dead foliage after flowering to tidy the plant.
How big does Trillium erectum grow?
Trillium erectum reaches a height of 0.4 m.
Is Trillium erectum hardy in the UK?
Trillium erectum 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 erectum?
By seed or division of rhizomes in autumn or early spring.
Is Trillium erectum toxic?
Toxic if ingested.
