Gladiolus cruentus

Gladiolus cruentus belongs to the iris family, Iridaceae. It comes from central coastal KwaZulu-Natal in South Africa. Kew places it in a subtropical climate. It is not native to Britain or Ireland. This plant grows from a corm beneath the soil. Its recorded height is about 3 feet [0.9 metres]. The sources give no mature width or detailed leaf description.

Flowers appear from July to August, according to Plants For A Future. Each flower has both male and female organs. Insects pollinate the blooms. The supplied records do not describe the fruit or seeds. This species helped give rise to cultivated garden gladioli. It therefore has a place in the history of these garden plants. Plants For A Future also lists cultivated beds as a growing site.

Choose a sunny spot with shelter from harsh conditions. The plant cannot grow in shade, according to Plants For A Future. It needs moist soil that lets excess water drain away. Sandy soil and loam both suit it. The cultivation notes call for a gritty, stony loam. They favour a pH of 6.5 to 7. The broader soil notes also allow mildly alkaline ground. These notes support a sunny bed with good drainage, not waterlogged soil.

Cold limits where this species can stay outdoors. Plants For A Future lists USDA zones 7–10. It also reports tolerance of about −5 to −10°C. The same source warns against growing it in colder areas. Seed can be sown in early spring under glass at 15°C. Fresh seed can also be sown in autumn in a warm greenhouse. Sow thinly so seedlings can stay undisturbed through their first year. Give occasional liquid feed during this stage. Pot up the young corms during autumn dormancy. Grow them under glass for another year or two. Then plant them outdoors in late spring. Division offers another way to raise more plants.

Plants For A Future records the flowers as edible. They may be eaten raw in salads or cooked. Its food-use rating is low, at one out of five. It lists no known medicinal uses or other practical uses. The source reports no known hazards, rather than confirmed safety. The supplied evidence gives no specific pest or disease problems.