Gladiolus zambesiacus

Gladiolus zambesiacus belongs to the iris family, Iridaceae. It is a perennial, which means it lives for years. Its native range runs from southern Malawi into Mozambique. Kew places it in the tropics, where seasons bring dry spells. Useful Tropical Plants reports it on higher ground in this region. It grows on open, rocky mountain sites with thin soil. Plants often root in cracks among the rocks. These sites have strong wet and dry seasons.

The plant grows from a small corm beneath the ground. This part stores food. It measures about 0.05 feet [0.015 metres] across. Each plant has six or seven leaves shaped like swords. Useful Tropical Plants gives its height as 1.5–2.5 feet [0.45–0.75 metres]. Its summary lists about 2 feet [0.6 metres]. These heights do not form a confirmed size range for garden plants. The sources give no width for a full-grown plant. They give no details of flower colour or fruit. Each flower has both male and female organs. Insects move pollen from flower to flower.

In the wild, rain wets the soil while plants grow. Water drains through the rocks, not staying around the corm. The soil then dries out in the hot dry season. Plants For A Future lists sun and light shade as suitable. It lists sandy soil, loam, and clay as options. Its pH range runs from slightly acid to slightly alkaline. That source favours moist soil. The habitat account stresses that soil dries with the seasons. These accounts distinguish moist soil during growth from wet soil year-round. Neither source gives a rating for how much cold plants withstand.

Plants For A Future lists garden beds as a possible site. Useful Tropical Plants records the species as a wild plant. It explains how to raise plants from seed or by division. Sow seed in pots, spread out rather than packed close. Leave the young plants in place for their first year. Move the small corms into pots while they are dormant. Young corms can also be split from the parent. The source says to plant them about 0.4 feet [0.12 metres] deep. It gives the same spacing and links depth with upright growth.

People sometimes gather wild corms for use as local food. The sources do not say how to prepare them. Plants For A Future gives a low score for edible use. Both accounts report no known uses as medicine or for other purposes. They list no known hazards, but this does not establish safety. Neither account names any pests or diseases that affect this plant.