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Herbaceous Perennial

Agapanthus 'Midnight Star'
  • RHS AGM

African lily 'Midnight Star'

A deciduous perennial forming a clump of narrowly strap-shaped leaves. Stout stems carry rounded umbels of very dark blue flowers from mid to late summer

Synonyms
Agapanthus 'Navy Blue'
Agapanthus campanulatus 'Navy Blue'

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Size
Ultimate height
0.5–1 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Blue Green
Autumn Green
Winter
Position
  • Full sun
Aspect

South–facing or West–facing or East–facing

Exposure
Sheltered
Hardiness
H5
Botanical details
Family
Amaryllidaceae
Native to the UK
No
Foliage
Deciduous
Habit
Bushy
Potentially harmful
Humans/Pets (dogs, cats): harmful if eaten. Wear gloves and other protective equipment when handling. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus

Agapanthus are clump-forming perennials with narrowly strap-shaped leaves, evergreen in some species, and erect stems bearing umbels of funnel-shaped blue or white flowers

Name status

Accepted

How to grow

Cultivation

Grow in fertile, moist but well-drained soil in full sun or grow in a container. In cold areas, mulch well overwinter. See Agapanthus cultivation for further advice

Propagation

Propagate by division every 3 to 4 years in spring

Suggested planting locations and garden types
  • City and courtyard gardens
  • Mediterranean climate plants
  • Coastal
  • Cottage and informal garden
  • Patio and container plants
  • Flower borders and beds
  • Wall side borders
Pruning

No need to cut down in the autumn, as the seedheads look attractive over winter

Pests

May be susceptible to slugs and snails and agapanthus gall midge

Diseases

May be susceptible to a virus

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