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Herbaceous Perennial

Agapanthus 'Glen Avon'

African lily 'Glen Avon'

A herbaceous perennial up to 1m high with evergreen, broad, strap-shaped green leaves and stiff stems carrying large heads of flowers, the petals sky-blue (paler on mature clumps) with darker central stripes, in late summer; young plants are half-hardy, to H3, while mature clumps are hardier, to H4

Synonyms

Agapanthus africanus 'Glenavon'
Agapanthus 'Glenavon Blue'
see moreAgapanthus Fragrant Glen

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Ultimate height

0.5–1 metres

Time to ultimate height

2–5 years

Ultimate spread

0.5–1 metres

Chalk

Loam

Sand

Moisture

Moist but well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

South–facing or West–facing or East–facing

Exposure

Sheltered

Hardiness
Hardiness ratings
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H1a: under glass all year (>15C)
H1b: can be grown outside in the summer (10 - 15)
H1c: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20)

Botanical details

Family: Amaryllidaceae
Native to GB / Ireland: No
Foliage: Evergreen
Habit: Clump forming
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 containers in peat-free, loam-based compost, water freely when in growth but sparingly in winter, and apply a balanced liquid fertilizer monthly from spring until flowering; in mild areas, grow outside in moisture-retentive but well-drained soil in full sun, and provide winter protection with a dry mulch; for more advice, see Agapanthus cultivation

Propagation

Propagate by division between spring and early summer, or in early autumn after plants have finished flowering

Suggested planting locations and garden types

Cottage and informal garden
Patio and container plants
City and courtyard gardens
Coastal
Gravel garden
Mediterranean climate plants
Cut flowers
Flower borders and beds
Wall side borders

Pruning

No pruning required except cutting back dead flower stems, but allow them to remain until spring, because the seedheads look attractive over winter

Pests

May be susceptible to slugs and snails and agapanthus gall midge but generally pest-free

Diseases

May be susceptible to a virus

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