A small genus, in cultivation at least, but one that we find very rewarding, as the plants persist well and flower reliably.
These are glasshouse bulbs as the genus is not hardy in the UK, but they can be dried off in winter and stored in the house, restarting them in April-May. Ours are grown under frost-free glass, in deep beds of sandy loam, enriched with humus matter, under glass. These are maintained at a minimum of 40°F during the winter, when they are kept quite dry.
Growth starts in the spring, when the plants flower and persists through summer. Growth is not difficult although some species benefit from deep planting, simply to discourage the production of offsets that can proliferate at the expense of flowers, when they are grown in pots.