Agapanthus campanulatus 'Cobalt Blue' (African lily 'Cobalt Blue')

Botanical name

Agapanthus campanulatus 'Cobalt Blue'

Other names

African lily 'Cobalt Blue', Lily of the Nile 'Cobalt Blue', Spreading bell agapanthus 'Cobalt Blue'

Genus

Agapanthus Agapanthus

Variety or Cultivar

'Cobalt Blue' _ 'Cobalt Blue' is a clump-forming, deciduous to semi-evergreen perennial with strap-shaped, dark green leaves and sturdy, upright stems bearing spherical heads of tubular to trumpet-shaped, deep violet-blue flowers in summer.

Foliage

Deciduous

Habit

Clump-forming, Erect flower stem

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Colour

Flower

Blue, Violet in Summer

Foliage

Dark-green in Spring; Dark-green in Summer; Dark-green in Autumn

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How to care

Watch out for

Pests

Generally pest free.

Diseases

Generally disease free, but a virus disease may be a problem.

General care

Pruning

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

Propagation

Propagate by division every 3 to 4 years in spring.

Propagation methods

Division

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Monthly care advice

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Where to grow

Agapanthus campanulatus 'Cobalt Blue' (African lily 'Cobalt Blue') will reach a height of 0.9m and a spread of 0.6m after 2-5 years.

Suggested uses

Architectural, Coastal, Flower Arranging, Beds and borders, Mediterranean, Containers, Sub-Tropical

Cultivation

Grow in fertile, moist, well-drained soil in full sun. Suitable for growing in a container. Apply a thick, dry, winter mulch in cold areas.

Soil type

Chalky, Clay, Loamy, Sandy (will tolerate most soil types)

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Full Sun

Aspect

South, East, West

Exposure

Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Hardy (H4)

USDA zones

Zone 10, Zone 9, Zone 8, Zone 7

Defra's Risk register #1

Plant name

Agapanthus campanulatus 'Cobalt Blue' (African lily 'Cobalt Blue')

Common pest name

Agapanthus gall midge

Scientific pest name

Enigmadiplosis agapanthi

Type

Insect

Current status in UK

Present (Limited)

Likelihood to spread in UK (1 is very low - 5 is very high)

4

Impact (1 is very low - 5 is very high)

4

General biosecurity comments

Previously unknown gall midge; reported to be affecting Agapanthus across southern England with findings also in the north of England. Stakeholder led research and awareness will help to determine its distribution and consider suppression options.

About this section

Our plants are under greater threat than ever before. There is increasing movement of plants and other material traded from an increasing variety of sources. This increases the chances of exotic pests arriving with imported goods and travellers, as well as by natural means. Shoot is working with Defra to help members to do their part in preventing the introduction and spread of invasive risks.

Traveling or importing plants? Please read "Don't risk it" advice here

Suspected outbreak? Click here for contact details to report to the relevant authority.

Date updated: 7^th March 2019 For more information visit: https://planthealthportal.defra.gov.uk/