Propagation is from offsets or by sowing seeds when they burst open from their capsules in the late summer. The offsets are removed after flowering or during dormancy. Seeds of Crinum campanulatum and other species in this genus often send out roots before being planted in a suitable medium. For good results it is better to sow the irregularly shaped seeds as fresh as possible, in other words as soon as they ripen.

Deep trays can be used with a mixture of 2 parts coarse river sand and 1 part milled pine bark. Press the seed lightly into the sand or merely placed on the surface. Do not cover the seeds entirely, they must be able to photosynthesize.

Flowering should take place from the third season onwards. It is believed that plants kept dry during the dormant period i.e. winter, will perform much better and produce good flowers in the growing season starting in spring. This is not always the case, as many plants in the wild that are found in permanent to semi-permanent water, flower regularly each year. Plants must be in sunny positions to produce good flowers.

Feed plants well with organic fertilizers in the form of liquid feeds and generous amounts of well-rotted compost prior to immersing them in water. They respond well to nutrient-rich mediums. These aquatic plants are best grown in 150-200 mm pots plunged into a pool 100 mm under water in the early spring. Remember that these plants need to be protected against extreme cold conditions. Plants will survive irrigation during the dormant season provided the soil is well drained.

Other geophytic species that do well in wet conditions include Onixotis stricta (water phlox), Zanthedescia aethiopica (arum lily ), Romulea multisecta (romulea), R. aquatica, Spiloxene aquatica (Cape star), S. capensis and S. canaliculata. Consider also Cyperus textilis, C. papyrus, Aponogeton distachyos, Nympaea nouchali (water lily) and Nymphoides indica (yellow water onion).