Gladiolus rehmannii is a summer-growing Gladiolus, requiring a more humus-rich, less well-drained medium and more regular drenching during the growing period than  winter growers. Propagation is by sowing of seed in spring and by separation of corm offsets and cormlets in winter. Plant corms in spring (about September) and give plenty of water all through the growing season. Corms are best planted in open ground, rather than pots, roughly 10 cm deep and 15 cm apart.

Summer-growing Gladiolus species such as G. rehmannii, are particularly susceptible to a wide range of pests, such as aphids which attack developing inflorescences, thrips which results in deformed flowers and red spider mites which infect the leaf surfaces, as does rust fungus.