The fortnight lily goes by many names, including African iris, butterfly iris, Wood iris, and scientifically Dietes iridioides. The name fortnight lily is based on the blooming cycle of the flowers, where new blooms come up approximately every two weeks. Native to Eastern and Southern Africa, Dietes iridioides (Fortnight Lily) is a rhizomatous evergreen perennial with attractive flowers resembling small Japanese Irises.

Understanding the Context

The Fortnight lily gets its name from its recurring two week flowering cycle during spring and into summer. This is a narrow-leaved species that grows to 30 in. tall with medium green leaves that quickly grows to form dense clumps in gardens and landscapes. The Fortnight Lily (Dietes iridioides), also known as African Iris or Butterfly Iris, is a captivating perennial.

Key Insights

Its name comes from its unique blooming cycle, with new flowers emerging approximately every two weeks for a continuous display. Dietes iridioides, commonly named African iris, fortnight lily, and morea iris, is a species of plant in the family Iridaceae that is native to Southern Africa. Consider this your comprehensive fortnight lily plant care guide, packed with actionable advice from an experienced gardener to help you grow these stunning plants with confidence. Fortnight lily thrives in well-draining soil and requires moderate watering, aiming to keep the soil slightly moist but not waterlogged. It is tolerant of various light conditions but prefers full sun to partial shade for optimal blooming.

Final Thoughts

A member of the iris family, it produces large white flowers with violet and yellow markings and is the showiest of the fortnight lily species. Its blooms seem to come at two-week intervals, hence the common name, fortnight lily. Often called the "Fortnight Lily," this South African beauty is a staple in architectural landscaping and drought-tolerant gardens. It earns its rhythmic nickname because it tends to bloom in cycles—bursting into flower, resting for about two weeks, and then blooming again.