Dietes bicolor

Evergreen Iris

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Common Name: 

Evergreen Iris

Plant Type: 

Flower color: 

Foliage color: 

Green

Sun (From 0 to 5): 

Water (From 0 to 5): 

Maximum temperature: 

40°C

Minimum temperature: 

7°C

Maximum height: 

90 cm

Maximum width: 

30 cm

Evergreen Iris (Dietes bicolor) - Description

D. bicolor is native to South Africa. It bears flowers that are light yellow with dark brown to maroon spots.

Evergreen Iris (Dietes bicolor) - Blooming

Flowers look very similar to Japanese Irises and come in colors such as white, cream, yellow with blotches of orange, yellow or brown. Flowers appear from spring through fall; however, in more mild-winter climates they may flower well into winter.

Evergreen Iris (Dietes bicolor) - Growth

Evergreen perennials with rhizomes. Fortnight Lilies do well in full sun, or full light, or partial shade. In areas where Dietes is not growing hardy, raise plants in a cool greenhouse with a minimum temperature of 35°F (2°C). During the day, set temperatures between 41-50°F (5-10°C), and at night, keep the temperature at 36°F (2°C). In warmer areas, Dietes can be grown outdoors where it works well in a border.

Evergreen Iris (Dietes bicolor) - Planting

To propagate divide clusters in the fall or winter. Division entails propagating a plant by splitting it into 2 or more parts. Each part has its own root system and more than one shoot or dormant bud. Although bare rhizomes are generally not sold, you can transplant container-grown Fortnight Lilies any time of year. Set them in the ground 2 ft. apart.

Evergreen Iris (Dietes bicolor) - Pest

Crow and root rots along with rust are common problems.

Evergreen Iris (Dietes bicolor) - Interesting facts

The common name "Fortnight Lily" comes from the tendency of species of this genus to produce clusters of flowers every 2 weeks.

Evergreen Iris (Dietes bicolor) - Soil and irrigation

Good, well-drained soil and regular water helps members of this genus to look good as it is getting established. Once established, Fortnight Lilies perform well in all varieties of soil with infrequent watering, especially after flowering. Keep just moist during dormancy. Indoors, grow in a soil-based potting mix.

Dietes bicolor - Evergreen Iris - Photos