Rheum × hybridum
garden rhubarb
A herbaceous perennial which develops from a short crown, producing thick, angular stems and somewhat triangular leaves. The edible stems are 30-40cm in length and change from a light pink to red and finally green as they develop and age
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Size
Ultimate height
1–1.5 metresTime to ultimate height
2–5 yearsUltimate spread
1–1.5 metresGrowing conditions
Moisture
Moist but well–drainedpH
Acid, Alkaline, NeutralColour & scent
Stem | Flower | Foliage | Fruit | |
Spring | Pink Red | Green | ||
---|---|---|---|---|
Summer | Green | Green | ||
Autumn | ||||
Winter |
Position
- Full sun
Aspect
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Exposure
Sheltered Hardiness
H5Botanical details
- Family
- Polygonaceae
- Native to the UK
- No
- Foliage
- Deciduous
- Habit
- Bushy
- Potentially harmful
- Harmful if eaten, except cooked leaf stalks. Wear gloves and other protective equipment when handling. Pets: Harmful if eaten, except 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
Any fertile garden soil can be used for rhubarb as long as it is well-drained and in full sun. Crowns (""sets"") can be cropped for ten or more years, though division may be necessary after about five years. Plant crowns in November or December and up to the beginning of March if necessary. A spring mulch of well-rotted organic matter 7cm (2 1/2in) deep will help to retain moisture but do not bury the crowns. Plants will also respond to watering during prolonged dry periods in summer. Apply a general fertiliser in spring or summer . See also rhubarb cultivation
Propagation
Lift crowns between autumn and early spring (usually in November). Use a spade to divide the crown into sections each retaining a portion of the rhizome (thickened root) and at least one growing point. Sections from the outer part are better than the centres of old plants. Discard any old or decayed parts of the crown. Replant straight away or wrap in damp sacking until ready to plant
Suggested planting locations and garden types
- Patio and container plants
- Cottage and informal garden
- Architectural
- Low Maintenance
Pruning
Remove any flowerheads that may develop. Allow the foliage to die back naturally in autumn then cut away the old leaves to expose the growing points to winter cold
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
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