Propagation is by seed or vegetatively. Seeds should be sown soon after ripening as the seed starts germinating then. A coarse medium such as river sand is ideal, and seedlings must be kept moist, but not overwatered. It will take many years for these to reach flowering age.

It is also possible to separate bulbs from mature plants that multiply under the ground.

Another vegetative method is to cut away a small section of the bulb base where the roots emerge and plant it into a coarse medium. Bulblets should appear at the base within a few months. This must be done in the vegetative stage of the growth cycle i.e. just before the leaves appear.

These plants can be grown in the garden in suitable climates, or in pots. They are complemented with other geophytes from the amaryllid family such as Boophane, Amaryllis and Nerine which all put up a spectacular show in summer. They all require good drainage and a dry, dormant period to thrive.

Not many pests are known to attack B. josephinae, except the amaryllis borer, a caterpillar with yellow and black markings on its body. The caterpillar is most active at night where it can be found boring into the leaves as well as fruits. It is advisable to use biological control by introducing insect-eating birds to the garden since sunbirds are  nectar feeders, not insectivorous! Alternatively a systemic insecticide may be used.