The cultivation of Dierama pendulum presents no great difficulty provided that a few simple points are borne in mind. The plants are evergreen, but nevertheless undergo a rest period from autumn to the end of winter, during which they are able to survive relatively dry conditions, whereas from early spring until late summer they require regular heavy watering. The corms do however easily withstand moisture during their winter rest period. As the corms are never completely dormant, they should not be lifted and stored dry as this will soon lead to desiccation and death within a few weeks.

The plants require as sunny a position as possible and it is important to note that even during their winter rest phase, they must receive adequate sun or very bright light for them to produce flowers from early spring to early summer. They prefer a slightly acid, well-composted loam and perform equally successfully in both well-drained and boggy conditions. They form dense clumps with age and these should be left undisturbed for up to five years or more, until flowering frequency diminishes, or propagative material is required. The green leaves of all dieramas should never be cut back as this severely retards growth and flowering; only the outer, brown, old leaves should be removed by gentle tugging. D. pendulum is most effectively displayed on raised banks overhanging garden ponds, but can also be used in many other parts of the garden such as in rockeries or borders, provided it received sufficient sunlight. Most of the species, including D. pendulum, are at least able to withstand light frost, and all the species are perfectly hardy in mild parts of the northern hemisphere. Propagation is easily achieved by means of fresh seeds sown in spring, or by division of thick clumps in spring, ensuring that divisions are replanted immediately, and kept well watered.

The leaves of Dierama pendulum and many other members of this genus are highly suscpetible to red spider mites and the rust fungus Uromyces transversalis. Red spider mites are problematic during the hot summer months and attack both surfaces of the leaves, resulting in a silvery-bronze sheen, for which spraying with mineral oil can be used as a measure of control. Ensuring that plants receive adequate sunlight throughout the year, assists in reducing the incidence of rust fungi. The corms of all dieramas are relished by mound-forming mole rats and in susceptible areas they should be planted into sunken, sturdy wire baskets.