This very fast growing, graceful bulb grows to 50cm x 20cm. It is deciduous, growing during summer and dormant in the winter and should be kept dry during that period. This is an easy plant in cultivation and is ideally suited to the rockery but will do equally well in a container. It can also be used to good effect planted in clumps or drifts in the mixed border. It is lovely used in an indigenous meadow, planted amongst indigenous grasses. Each individual flower is not long-lasting, but there are so many of them opening in succession that the inflorescence will last for up to a month in the garden, and it is a useful cut flower. It requires a sunny or semi-shaded position. The lovely rocket shaped spikes of misty-blue flowers open in summer and are displayed on long stalks. It is traditionally used to heal internal tumours, boils and sores. The bulbs are hung and take 5 months to dry. The powered bulb is used to treat fractures and sprains. The cooked bulb is eaten as a laxative. It is analgesic and anti microbial. It is also used as an emetic to rejuvenate the body and promote fertility in women.It attracts butterflies. Named for Frederick Ziervogel van der Merwe ( 1894-1968), a South African botanist and medical doctor. His medical degrees were achieved at Trinity College in Dublin, Liverpool University and Wits. As a medical inspector he travelled widely and he had an interest in botany, particularly the Aloe and Scilla families. His other interest was collecting sheet music of Africana value. He also wrote the first Afrikaans dictionary of medical terms. The name is derived from the Greek skilla=squill or sea leek and the Greek skyllo=injure which refers to the poisonous bulb. This is a protected plant in South Africa.