Gladiolus

Gladiolus, commonly called gladiolus or glads, is a genus of flowering plants in the iris family Iridaceae. Native to Africa (notably southern Africa) and parts of the Mediterranean and Asia, it is widely grown as an ornamental plant in warm climates and as a summer annual in temperate regions. The plant forms a corm from which a tall flowering spike rises. The spike bears multiple funnel-shaped flowers along the stem. Leaves are sword-shaped and arranged in two vertical ranks.

Cultivation: Gladiolus are grown from corms. They prefer well-drained soil and full sun. In temperate regions corms are planted after the last frost, about 15–20 cm apart with 60–90 cm between rows, at a depth of 5–10 cm. Water during growth and stake tall spikes. In climates with cold winters, corms are lifted and stored dry. Many cultivars produce spikes from 60 cm up to 180 cm in height, with a wide range of colors.

Uses and symbolism: Gladiolus is popular in borders and as a cut flower, used in arrangements and bouquets. The genus name derives from Latin gladius, meaning sword, a reference to the sword-like leaves and upright flower spikes. In floriography, gladiolus symbolizes strength of character and integrity; it is associated with remembrance in some traditions.

Pests and diseases: Common problems include thrips and fungal diseases such as rust and botrytis blight, as well as leaf spots. Good air circulation, proper spacing, and sanitation help prevent outbreaks.

Taxonomy: Gladiolus is a large genus with about 250–260 species and numerous cultivars and hybrids. Gladiolus × hortulanus is a widely grown garden hybrid used for cut flowers.