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botanical name:
Agapanthus africanus
Agapanthus africanus © Deeproot Plant Base
common name:  African lily
synonyms:  Agapanthus umbellatus
family:  Liliaceae
characteristics: perennial, evergreen
height: 0.90m
width: 0.50m
growth rate: medium
growth habit: grassy
leaf colour: green
flower colour: blue
stem/bark: green
main season: Summer
aspect: full sun
conditions: dry soil, moist soil, sandy soil, coastal
preferred soil pH: acid
minimum temp: -3°C
USDA zone: 9 to 10
Fleshy rooted evergreen with relatively short, strap-like leathery leaves and strong stems supporting the large umbels of tubular blue flowers.

Not very hardy in Britain, but will tolerate several degrees of frost if located in a favourable, well drained, position. Must have good sunlight to flower successfully. Prefers a light, slightly acid, very well drained soil.

By division, which is best done only when clumps get very congested.
From seed, sown as soon as ripe or in spring. Best left undisturbed in their first year. May take 2 or 3 years to produce flower.

other notes:
Often confused with Agapanthus praecox.
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