Agapanthus is a genus of about ten species and quite a number of cultivars and hybrids. They are perennials with fleshy roots. Their main attraction is the heads of small trumpet-shaped flowers that appear in the summer. These are held either in loose clusters that droop, or stand out straight forming airy spheres of flowers, much in the way as many onions (Allium). They are generally blue and often a very deep rich blue, but they can also be white. The leaves are strap-like and form a fountain from which the naked flower stems rise.
Coming from southern Africa they were once all thought to be tender and were only grown in tubs that could be moved inside for the winter, but increasingly more and more hybrids and cultivars are being permanently left outside. They make excellent border plants, preferably in full sun although they can be grown in very light shade. They are also very good as specimen plants, especially when used in large containers and placed in key positions, such as on a terrace or at the bottom of steps. Plant in a fertile, moisture-retentive but free-draining soil. Increase by division.