Dietes iridioides (African Iris, Fortnight Lily)

Growing Dietes iridioides Successfully in NZ

To grow Dietes iridioides successfully in New Zealand, plant it in a sunny to partially shaded position with well-drained soil. This hardy, clump-forming perennial tolerates drought, coastal conditions, and light frosts, making it suitable for a wide range of landscapes. Water regularly during dry spells when establishing, and apply mulch to retain moisture. Remove spent flower stalks and divide clumps every few years to maintain vigour. It’s ideal for borders, mass planting, and low-maintenance gardens.

Dietes iridioides Care Tips

Plant in full sun to partial shade with well-drained soil. Water regularly during dry periods, especially while establishing, but once mature, it’s drought-tolerant. Apply a balanced slow-release fertiliser in spring to support flowering. Remove spent flower stems to encourage new blooms and trim back old leaves to keep the plant tidy. Divide clumps every few years to rejuvenate growth. Hardy and low-maintenance, it’s well-suited to New Zealand gardens, including coastal and exposed sites.

Plant Size and Spacing

Dietes iridioides typically grows to a height of around 60–90 cm and a width of 60 cm. When planting, space plants approximately 50–70 cm apart to allow for clump expansion and good air circulation. This spacing works well for mass planting, borders, or along pathways, ensuring each plant has room to grow while creating a lush, uniform appearance.

Why Buy Dietes iridioides from The Plant Company

Buy Dietes iridioides from The Plant Company for high-quality, nursery-grown plants that are healthy, hardy, and ready to thrive. Our plants are expertly cared for to ensure strong roots and vigorous growth. We deliver across New Zealand and provide helpful care advice to support long-term success in your garden. Ideal for borders, mass planting, or low-maintenance spaces, Dietes iridioides is a reliable, easy-care choice backed by trusted service from The Plant Company.

What is the common name for Dietes iridioides?

The common names for Dietes iridioides include African iris, Fortnight lily, Morea iris, and Wild iris. "African iris" is the most common name for this plant.

What is the difference: Dietes grandiflora vs Dietes iridioides

Dietes grandiflora and Dietes iridioides are often confused, as they share a similar appearance. However, there are key differences that distinguish them. Dietes grandiflora has significantly larger flowers that last for several days. Dietes iridioides has smaller flowers that typically only last for 1-2 days. Dietes grandiflora has dark spots or brown markings at the base of its outer tepals (petal-like segments). Dietes iridioides lacks these dark spots; it primarily has yellow markings. Dietes grandiflora tends to be a larger plant, reaching heights of up to 1.5 metres.