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Herbaceous Perennial

Agapanthus inapertus subsp. hollandii

A slow-spreading, clump-forming perennial with narrow, strap-shaped, deciduous leaves and upright, slender stems to 1.8m tall bearing large clusters of narrowly tubular, mid to dark blue, nodding flowers each 3-5cm long

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Ultimate height

1.5–2.5 metres

Time to ultimate height

2–5 years

Ultimate spread

0.1–0.5 metres

Chalk

Clay

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: Deciduous
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: Correct
Plant range: South Africa

How to grow

Cultivation

Grow in moisture-retentive but well-drained soil in full sun, and in colder areas provide winter protection with a loose mulch; in containers, grow 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; 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

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

Pruning

No pruning required; leave seedheads for winter interest and cut back in late winter or early spring

Pests

May be susceptible to slugs and snails and agapanthus gall midge

Diseases

May be susceptible to a virus

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