Rheum kialense

Herbaceous Perennial

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A clump-forming herbaceous perennial to around 25cm in height, grown as an ornamental rhubarb, with small, heart-shaped, deeply veined dark green leaves. Small maroon-red and white flowers appear from May to June

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Size

Time to Maturity: 2–5 years

Growing Conditions

Chalk Clay Loam Sand

Moisture: Moist but well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun Partial shade

Aspect: East–facing or South–facing or West–facing
Exposure: Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H5

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Polygonaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Bushy, Clump forming
Potentially harmful: Harmful if eatenexcept cooked leaf stalks, but this variety is used as an ornamental not edible plant. Wear gloves and other protective equipment when handling. Pets: Harmful if eatenexcept cooked leaf stalks - for further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus: Rheum are robust rhizomatous herbaceous perennials with large, simple or palmately lobed leaves and tall leafy stems bearing large panicles of tiny flowers
Name Status: Correct

How to Grow

Cultivation

Grow in deep, moist, humus-rich soil. Mulch with manure in spring; avoid covering the crown. Keep watered in dry summers and divide every five years to maintain vigour. See rhubarb cultivation for more detailed advice

Propagation

Propagate by division of established crowns in late autumn or early spring

Suggested planting locations and garden types

Architectural
Cottage and informal garden
Patio and container plants
Low Maintenance
Flower borders and beds

Pruning

Cut back in autumn

Pests

May be susceptible to stem and bulb eelworm, swift moth caterpillar, and to slugs and snails on young growth

Diseases

May be susceptible to honey fungus, downy mildews, grey mould, crown rot and virus diseases