African lily
Dietes bicolor · Iridaceae
📷 Mazarbulrin · CC BY-SA 3.0
The gardener's calendar
Ideal time to plant african lily: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Scientific name
- Dietes bicolor
- Family
- Iridaceae
- Plant type
- Perennial bulbous plant
- Foliage
- Persistent, linear and slender
- Flowering
- May to August
- Adult height
- Around 60 cm
- Hardiness
- Hardy in temperate climates, protect in cold zones
- Origin
- South Africa
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability medium.
Expert tips
The key tip
Dietes bicolor is grown as a perennial: in well-drained soil, it grows densely and produces flowers regularly throughout summer. Divide it every 3–4 years (in spring) to rejuvenate the clumps.
The common mistake
Letting it smother in its old crown: after 4 years, the center dies back and flowering becomes sparse and off-center.
The pro's trick
When dividing in spring, you can replant the divisions just 15 cm apart to quickly rebuild a dense border.
Seasonal watch
In humid autumn, watch out for rot on the lower leaves.
Care
Light exposure
The yellow African iris demands full sun exposure for abundant and regular flowering. A minimum of 6 hours of direct daily sunlight is recommended. Partially shaded areas reduce vigor and flower production.
Watering
Water regularly during the growing and flowering season, keeping the soil moist but well-drained. Reduce watering in winter when the plant slows its activity. Avoid excess humidity that promotes bulb rot.
Soil
Prefer well-drained soil, slightly sandy or enriched with organic matter. Overly compact or water-retaining soil will be detrimental. An amendment at planting facilitates establishment and drainage.
Fertilizing
Apply a balanced fertilizer in spring when vegetation begins. Add an extra application in early summer to support flowering. Excess nitrogen encourages foliage at the expense of flowers.
Pruning and maintenance
Remove faded flowers regularly to extend the flowering period. In late winter, cut back dried foliage to ground level. Divide clumps every 3 to 4 years to rejuvenate the plant and promote vigorous flowering.
Pests and diseases
The yellow African iris is generally not very susceptible to pests. Watch for rot if there is excess humidity and ensure good air circulation. Mealybugs are occasionally observed on the foliage.
Did you know?
The yellow African iris, despite its common name, is not a true iris botanically speaking, but belongs to the genus Dietes of the Iridaceae family. Native to South Africa, this easy and floriferous plant has won over Mediterranean gardens where it flowers generously with its delicate yellow flowers streaked with black, ideal for creating natural and luminous displays.
Where to buy it
Plant the bulbs in autumn for spring flowering. Pick a plant with healthy foliage and roots that are not exposed. Best time: from September to November.
Add this plant to my garden →Plants from the same family
- Early crocusCrocus tommasinianus
- Narrow-leaved blue-eyed grassSisyrinchium angustifolium
- Tiger irisIris domestica
- Fringed irisIris japonica
- Japanese irisIris ensata
- Snow CrocusCrocus chrysanthus
Tips generated and checked by Viridia — adapt them to your local climate.