About
Rheum alexandrae, the Chinese rhubarb, is an ornamental species producing a basal rosette of long, pointed, glossy, dark-green leaves and a distinctive flower spike to 1.2 m, densely clothed in overlapping, cream-white bracts that protect the small, yellowish flowers. A fascinating and highly ornamental architectural plant for a moist, sheltered border.
About the genus
Rheum, the ornamental rhubarbs, are large, bold, rhizomatous perennials with enormous, basal, rounded or lobed leaves and tall, plume-like flower stems bearing tiny flowers in white, pink or red. Dramatic architectural plants for moist, sheltered borders.
Growing conditions
SunlightFull sun, Partial shade
Soil typeClay, Loam
Soil pHAcid, Neutral
Soil moisturePoorly-drained
AspectSouth-facing, North-facing, West-facing, East-facing
ExposureExposed, Sheltered
UK hardinessH6
Plant details
Plant typeBogs, Herbaceous Perennial
HabitBushy
FoliageDeciduous
Height1-1.5 metres
Spread0.5-1 metres
Time to full height2-5 years
Suggested usesArchitectural, Cottage and informal garden
Native toSW China
ToxicityHarmful if eaten. Wear gloves and other protective equipment when handling Pets: Harmful if eaten - for further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Care notes
CultivationPrefers deep, humus-rich, permanently moist soil in full sun. Benefits from mulching with organic matter in spring
PruningDeadhead spent flower spikes
PropagationPropagate by division in early spring
Pest resistanceMay be susceptible to slugs and aphids
Disease resistanceGenerally disease-free