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Rheum alexandrae (Alexander's rhubarb)
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1 hour care
per year
per year
1.5m
Max height
Max height
0.6m
Max spread
Max spread
2-5 years
To maturity
To maturity
Plant details
Botanical name
Rheum alexandrae
Other names
Alexander's rhubarb, Alexander's ornamental rhubarb
Genus
Rheum Rheum
Species
R. alexandrae - R. alexandrae is a rosette-forming, rhizomatous, deciduous perennial bearing oblong to ovate, glossy, dark green leaves with prominent veins and, from late spring into summer, erect panicles of tiny, star-shaped, yellow-green flowers covered by large, greenish-white or yellow bracts.
Rheum alexandrae is: Deciduous
Habit
Erect flower stem, Rosette
Flower
Pale-yellow, Greenish-white in Summer
Foliage
Dark-green in Spring; Dark-green in Summer; Dark-green in Autumn
How to care
Watch out for
Specific pests
Aphids Aphids
Crown rot Crown rot
General care
Pruning
Deadhead faded flower spikes.
Propagation methods
Division, Seed
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Where to grow
Rheum alexandrae (Alexander's rhubarb) will reach a height of 1.5m and a spread of 0.6m after 2-5 years.
Suggested uses
Waterside, Cottage/Informal, Bog garden, Beds and borders, Architectural
Cultivation
Grow in fertile, moist or boggy, neutral to acid soil in sun or partial shade. Mulch in spring.
Soil type
Clay, Loamy
Soil drainage
Boggy damp conditions, Moisture-retentive
Soil pH
Acid, Neutral
Light
Partial Shade, Full Sun
Aspect
North, South, East, West
Exposure
Exposed, Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4)
Companion plants
Botanical name
Rheum alexandrae
Other names
Alexander's rhubarb, Alexander's ornamental rhubarb
Genus
Rheum Rheum
Species
R. alexandrae - R. alexandrae is a rosette-forming, rhizomatous, deciduous perennial bearing oblong to ovate, glossy, dark green leaves with prominent veins and, from late spring into summer, erect panicles of tiny, star-shaped, yellow-green flowers covered by large, greenish-white or yellow bracts.
Foliage
Deciduous
Habit
Erect flower stem, Rosette
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Colour
Flower
Pale-yellow, Greenish-white in Summer
Foliage
Dark-green in Spring; Dark-green in Summer; Dark-green in Autumn
How to care
Watch out for
Specific pests
Specific diseases
General care
Pruning
Deadhead faded flower spikes.
Propagation methods
Division, Seed
Monthly care advice
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Where to grow
Rheum alexandrae (Alexander's rhubarb) will reach a height of 1.5m and a spread of 0.6m after 2-5 years.
Suggested uses
Waterside, Cottage/Informal, Bog garden, Beds and borders, Architectural
Cultivation
Grow in fertile, moist or boggy, neutral to acid soil in sun or partial shade. Mulch in spring.
Soil type
Clay, Loamy
Soil drainage
Boggy damp conditions, Moisture-retentive
Soil pH
Acid, Neutral
Light
Partial Shade, Full Sun
Aspect
North, South, East, West
Exposure
Exposed, Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4)
USDA zones
Zone 7, Zone 6, Zone 5, Zone 4
In order to add a note on this plant, please add this plant to your plant lists.
| This plant likes... | Garden match | |
| Soil types: | Clay, Loamy | Tell us... |
| Soil drainage: | Boggy damp conditions, Moisture-retentive | Tell us... |
| Soil pH: | Acid, Neutral | Tell us... |
| Light: | Partial Shade, Full Sun | Tell us... |
| Aspect: | North, South, East, West | Tell us... |
| Exposure: | Exposed, Sheltered | Tell us... |
| Hardiness: | Hardy (H4) | Tell us... |
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