Rheum officinale
Chinese rhubarb, Medicinal rhubarb
- Height × spread
- 3m × 1.5m
- Position
- Full sun
- Hardiness
- Very cold to -20C (RHS H6)
- Flowers
- Summer
Availability
Please ask in store about availability
Many plants are seasonal. Call 01234 567890 to check current stock.
About this plant
A huge perennial with rather rounded leaves with shallow jagged lobes, impressed veins and an often corrugated appearance. There is an impressive long red flowering spike that bears spindly flowers coloured red. These are followed by green and white seeds. The plant originates in China or Tibet and its dried rhizomes have been imported for millennia and used as a purgative.
- Flower colour
- Red
- Foliage colour
- Green
- Fruit colour
- Red
- Variegated
- No
- Scent
- No
- Shape
- Cone
- Height
- 3m
- Spread
- 1.5m
- Season of interest
- Spring, Summer
- Flowers in
- Summer
- Evergreen
- Deciduous
- Sun or shade
- Likes full sun, tolerates part shade
- Soil type
- Loam (normal)
- Soil pH
- All types
- Drainage
- Moisture retentive soil
- Hardiness
- Very cold to -20C (RHS H6)
- Borders & containers
- Borders
- Use for
- Deer resistant, Rabbit resistant
- Hazards
- Yes, potentially harmful; Humans: Harmful if eaten
Spring
Spring · Outdoors
Apply an organic mulch
Apply a 5-10cm layer of organic mulch around the plant in spring to reduce weeds, retain moisture and keep roots cool in summer. Leave a 10cm gap between the stem and the mulch to prevent stem rot. Before applying mulch, clear the area of weeds and water if it hasn't rained recently. Use biodegradable material such as garden compost, well-rotted manure, leaf mould or bark chippings as mulch.
A mulch is a covering that can: protect the soil surface from rain, heat and cold; deter weeds; provide nutrients. Organic indicates that material has vegetative origin e.g. manure, compost. Synthetics i.e. plastics, or stones are often called mulches.
Spring-Autumn · Outdoors
Water to keep the soil moist
For best results, this plant needs soil that is always moist. Water deeply and regularly as soon as soil appears dry. Even for established plants in the ground, a dry week can cause problems with some soils. Check plants in pots more often, especially in hot weather. Or install an automatic irrigation system which will do the hard work for you, even when you are away on holiday.
Without regular watering some plants never fully regain their beauty.
Spring - early-mid · Planting
Divide when too large
The plant can be divided if it becomes too large or another plant is required. This may involve physically dividing the clump in two, removing offsets or small bulbs or dividing rhizomes. The new plants can be grown in pots or planted in the ground.
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