Fortnight Lily

Dietes bicolor

Attractive, light yellow iris-like flowers with vivid maroon blotches loom on stiff stalks over neat clumps. Useful in rock gardens, near swimming pools. Fire resistant. Reliable evergreen perennial.
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Good to grow!10


Full sun

Once established, needs only occasional watering.

We no longer grow this plant

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Botanical Pronunciationdy-AY-teez BY-kul-ur
Average Size at MaturityModerate grower to 2 to 3 ft. tall and wide clumps.
Bloom TimeSpring through fall
Design IdeasThe flowers of Fortnight Lily glow in the dark and look exotic in tropical gardens--despite the plant's tolerance of a hard frost. It is one of the best all-purpose plants for beds and borders, where it functions a lot like an Iris, but with a much longer bloom period. This plant is equally at home in Asian-garden schemes, where it is grown beside koy ponds or streambeds as a flowering reed. With its drought-resistance, it is commonly used in dryland gardens throughout the Southwest, where it takes inland heat in stride. Grow as a low hedge, partition, or simply plant in big pots on a balcony or porch.
Deciduous/ EvergreenEvergreen
Flower AttributeShowy Flowers
Flower ColorYellow
Foliage ColorGreen
Garden StyleContemporary
Growth HabitClumping
Growth RateModerate
Landscape UseBorder, Container, Firescaping/Fire Wise, Poolside, Rock Garden
Light NeedsFull sun
Soil NeedsAll-Purpose Plant Food
Special FeatureClump Forming, Easy Care, Improved Pest and Disease Resistance, Year-round Interest
Water NeedsLow
Watering NeedsOnce established, needs only occasional watering.

Follow a regular watering schedule during the first growing season to establish a deep, extensive root system. Control weeds until the plants have filled in. Feed with a general purpose fertilizer.

This Plant's Growing Zones: 8-10

Your USDA Cold Hardiness Zone: 10

Good to grow!