Rheum × hybridum 'Giant Grooveless Crimson'

RHS Plant Profile
rhubarb 'Giant Grooveless Crimson'

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Herbaceous Perennial

An herbaceous perennial with uniformly tall leaves from ground-level. The green leaves are supported by red stems which are reported to be less acidic than some varieties

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
2–5 years
Max Spread
0.5-1 metres
Max Height
0.5-1 metres

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 North–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)
H6

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Polygonaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Clump forming
Potentially harmful
Harmful if eatenexcept cooked leaf stalks. 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
Unresolved

How to Grow

Cultivation

Grow in moisture-retentive but well-drained, deep fertile soil in good light. See rhubarb cultivation for further advice

Propagation

Propagate by division in late winter

Pruning

Pruning group 1

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 moulds, crown rot and virus diseases