Agapanthus 'Happy Blue'
African lily 'Happy Blue'
'Happy Blue' is an evergreen perennial growing to around 60-70cm tall with dark green, strappy leaves. Flowerheads produce around 35-40 florets per head of light violet-blue flowers from summer onwards, followed by attractive seed heads once the flowers die off in the autumn.
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Size
Ultimate height
0.5–1 metresTime to ultimate height
2–5 yearsUltimate spread
0.1–0.5 metresGrowing conditions
Moisture
Moist but well–drained, Well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green | |||
|---|---|---|---|---|
| Summer | Blue Purple | Green | ||
| Autumn | Green | |||
| Winter | Green |
Position
- Full sun
Aspect
South–facing or West–facing or East–facing
Exposure
Sheltered Hardiness
H3Botanical 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
Unresolved
How to grow
Cultivation
In mild areas, grow in well-drained soil in a sunny, sheltered position. Otherwise grow in a container and position in full sun. Water during the growing season and liquid feed monthly from spring to flowering. Overwinter the whole container in a cold greenhouse. See agapanthus cultivation
Propagation
Propagate by division every three to four years in spring
Suggested planting locations and garden types
- Patio and container plants
- Cottage and informal garden
- Flower borders and beds
- Cut flowers
Pruning
No need to cut down in the autumn, as the seedheads look attractive over winter
Pests
May be susceptible to slugs and snails and agapanthus gall midge
Diseases
May be susceptible to a virus
Get involved
The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.