Agapanthus 'Ice Blue Star'

RHS Plant Profile
African lily 'Ice Blue Star'
Award of Garden Merit
Herbaceous Perennial

'Ice Blue Star' is a bulbous herbaceous perennial 1-1.2m high, with deciduous, slightly blue-green leaves, and large, full heads of pale violet-blue flowers, with darker central stripes, from midsummer to late summer

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
2–5 years
Max Spread
0.5-1 metres
Max Height
0.5-1 metres

Growing Conditions

Chalk Clay Loam Sand
Moisture
Moist but well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
West–facing or East–facing or South–facing
Exposure
Sheltered
Hardiness
H5

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

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
Accepted

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

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