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A picture of a Agapanthus 'Happy Blue'

Agapanthus 'Happy Blue'

Agapanthus 'Happy Blue'

Also known as

African Lily 'Happy Blue', Lily of The Nile 'Happy Blue'

Photo by Bali-HaiMailOrderNursery (All rights reserved)

Full Sun
Moderate care
Light watering


RHS hardiness


Minimum temperature

Expected size








3 years to reach maturity


  • spring
  • summer
  • autumn
  • winter

This plant has no fragrance

Agapanthus 'Happy Blue' Overview

Agapanthus 'Happy Blue' is a deciduous clump-forming perennial that produces charming light violet-blue flowers in late summer, whose petals have a deeper blue central mark. Forming rounded flower heads, they stand tall on erect stems, above glossy dark-green strap-like leaves. The tubular flowers fade as they age and hang downwards. The flowerheads are followed by attractive seedheads in the autumn. Also known as African Lily 'Happy Blue', these stunning South African plants look particularly good in Mediterranean style gardens or patio containers. But they need to be brought under cover during cold winters. In warmer areas, Agapanthus can also be planted into sheltered borders provided the soil is not too fertile, and where applying a winter mulch of leaf mould will help provide winter protection. Like all African Lilies, Agapanthus 'Happy Blue' prefers a sheltered position in full sun and free-draining soil. For best results, apply a balanced liquid fertilizer monthly from spring until flowering. Cold, wet winters are the main enemy of Agapanthus. If you are growing in containers, contrary to popular wisdom, Agapanthus do not like to be overcrowded. However, they also take a while to establish if planted up into too large a space. As a rule of thumb, pot on every two years using a gritty multipurpose mix. This lovely cultivar has earned a coveted 'RHS Award of Garden Merit'.

Common problems with Agapanthus 'Happy Blue'

How to harvest Agapanthus 'Happy Blue'

Harvest seeds after flowering (when the capsules have dried out). Cut flower stalks during or after flowering for a beautiful display in a vase.

How to propagate Agapanthus 'Happy Blue'


Seeds must be sown fresh in the autumn, or if you are in an area where you getbelow freezing temperatures, keep the seeds cool in the fridge and sow in the spring.


The best time to lift and divide Agapanthus is in autumn after they have finished flowering. (Evergreen varieties should be divided once every four years to continue producing good flowers.)

Special features of Agapanthus 'Happy Blue'

Pot plant

Popular outdoor pot plant.

Attractive flowers

Attractive clusters of trumpet-shaped flowers

Attracts useful insects

Attracts insects including bees and butterflies and insect-eating birds and nectar-loving birds.

Drought resistant

This species can withstand drought periods, as its fleshy rhizomes store water reserves.