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Herbaceous Perennial

Acanthus sennii

Ethiopian acanthus

A. sennii is an upright perennial or sub-shrub with oblong to oval, very spiny, mid-green leaves. Red, large-lippedflowers are produced in short,terminal spikes in mid-summer to early autumn

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Size
Ultimate height
1–1.5 metres
Time to ultimate height
2–5 years
Ultimate spread
1–1.5 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained, Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Red Green
Autumn Red Green
Winter
Position
  • Full sun
  • Partial shade
Aspect

West–facing or South–facing or North–facing or East–facing

Exposure
Sheltered
Drought resistance
Yes
Hardiness
H4
Botanical details
Family
Acanthaceae
Native to the UK
No
Foliage
Deciduous
Habit
Columnar upright
Genus

Acanthus are robust herbaceous perennials with handsome, lobed foliage and tall, erect racemes of two-lipped flowers with colourful bracts

Name status

Correct

Plant range
Ethiopia

How to grow

Cultivation

The ideal soil is a deep, fertile, well-drained loam but it will grow in most soils and has good drought tolerance.

Propagation

Propagate by division or by root cuttings

Suggested planting locations and garden types
  • Sub-tropical
  • Architectural
  • Cottage and informal garden
  • Low Maintenance
  • Flower borders and beds
Pruning

Cut down old flower stems

Pests

Generally pest free

Diseases

Powdery mildews may be a problem

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