About
A large rhizomatous perennial to 2m high, with oval to rounded basal leaves up to 75cm long that emerge from the ground in late spring. Leaves are mid green, with wavy edges, coarse hairs on the undersides and long, thick reddish stems; they are sometimes bronze when young and tinted red in autumn. In summer, produces tall, branching flower stems, bearing tiny, tightly clustered, nodding reddish-purple flowers. An ornamental plant grown for its striking substance.
About the genus
Rheum are robust rhizomatous herbaceous perennials with large, simple or palmately lobed leaves and tall leafy stems bearing large panicles of tiny flowers
Growing conditions
SunlightFull sun, Partial shade
Soil typeClay, Loam
Soil pHAcid, Neutral
Soil moistureMoist but well-drained
AspectEast-facing, South-facing, West-facing
ExposureExposed, Sheltered
UK hardinessH6
Plant details
Plant typeHerbaceous Perennial
HabitClump forming
FoliageDeciduous
Height1.5-2.5 metres
Spread1.5-2.5 metres
Time to full height2-5 years
Suggested usesArchitectural, Cottage and informal garden
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
CultivationGrow in deep, moist, fertile soil, ideally in a sunny position. Mulch with organic matter in early spring. Needs plenty of space
PruningCut back faded leaves at the end of the season
PropagationPropagate by seed, sown in containers in a cold frame in autumn, or by division in early spring
Pest resistanceMay be susceptible to slugs and aphids
Disease resistanceMay be susceptible to crown rot, honey fungus and virus diseases