C. falcatus is one of the easiest species to cultivate and it is most successfully grown as a container subject. Hanging baskets, or shallow or deep, 30-35 cm diameter plastic containers are most suitable. It requires a sharply drained growing medium such as equal parts of coarse river sand and finely milled bark or finely milled compost. The bulbs are planted with the entire neck and about one third of the bulb exposed. It does best in a lightly shaded position or one receiving morning sun and afternoon shade. A thorough drench is recommended every seven to ten days from mid-spring to the end of the summer growing period, until the leaves begin to turn yellow and die back in autumn. During late autumn and throughout the winter months, the soil should preferably be kept completely dry, but the bulbs can withstand some moisture provided the soil medium is sharply drained. The bulbs are gregarious and should be allowed to form thick clumps, and left undisturbed for at least five years, until clumps become too thick and flowering performance diminishes.

Propagation of C. falcatus is easily achieved by means of offsets and seed. In order to obtain pure seed, cross-pollination by hand is necessary between different clones. The black, flat papery seeds of Cyrtanthus species have limited viability and are best sown as soon as they are ripe, in deep seed trays in the same growing medium recommended for adult bulbs. The seeds are sown just under the surface and kept moist using a fine rose. Germination takes place within three to four weeks and seedlings should remain in their seed trays for two growing seasons before being planted out into permanent containers at the beginning of their third season. First flowers can be expected from the fifth season onwards, under ideal conditions. Offsets are best removed at the end of winter, just before active growth begins. They are removed by gentle tugging, and should not be forcibly broken off as this may cause excessive damage to the basal plate. Damaged surface should be treated with a fungicide and be replanted as soon as possible to prevent desiccation of the perennial fleshy roots.