Corm-plant with enormous, not winter-hardy.
are grown chiefly for , sometimes in the border. The corms are started into growth in warm conditions in spring; they are planted outside in late spring. Towards the end of the first weeks of autumn they are lifted; all foliage is removed and the corms are kept frost free, preferably in dry peat.
Rich, chalky soil. Propagation From offsets.
hybrids: Large-flowered gladioli, height 100-150 cm; flowering season mid to late summer; planting depth 6-8 cm. Numerous colours, but no blue forms. ‘Butterfly’ and ‘Mignon’ gladioli are less tall. Early-flowering forms are ‘Nanus’ and ‘Heraut’ gladioli.
Gladiolus primulinus: Height 50-70 cm;mid summer to early September; smaller but more graceful flowers in many colours.