Agapanthus: Agapanthus africanus
Also known as the African lily, agapanthus is native to South Africa. It is a member of the lily family (Liliaceae) and when grown in containers it will reach a height of 1.5 m (5 ft). The evergreen A. praecox is also a very popular container plant.
Broad, strap-shaped leaves grow from fleshy rhizomes. The impressive, eye-catching umbels, which may be white or blue depending on the variety, appear in summer. These should be removed after flowering. Agapanthus plants will grow both in sunny and partially shady positions. In summer they need plenty of water and weekly applications of fertilizer but they hate being. In winter, the plants should be allowed to over-winter in a light, cool position at a temperature of 5°C (41 °F) to ensure plenty of buds. If necessary, a fairly light basement will also do. The rhizomes should be kept almost dry to ensure they do not rot. Agapanthus is easily propagated by division of the rhizomes, an operation best performed in spring after the winter period of dormancy. The plants should only be repotted when the container looks as if it is completely full.