Dietes bicolor

African Iris, Fortnight Lily

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Perennial rhizomatous plant with arching blue-green foliage and striking yellow-orange flowers spotted with violet, native to South Africa.
yard Outdoor plants wb_sunny Half-shade / Sun pets Not pet-safe
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Plant Details

Common Name African Iris, Fortnight Lily
Family Iridaceae
Genus Dietes
Species Bicolor
Origin South Africa
Blooming Yellow and violet flowers spotted with dark centers during spring and summer.
Leaf Color Blue-green, glaucous
Sunlight Half-shade / Sun
Category Outdoor plants
Pet Friendly close No
yard

Care & Maintenance

terrain
Soil

Well-draining loamy soil with organic matter. Tolerates poor soils.

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Watering

Drought tolerant once established. Water regularly during establishment and dry summer periods. Reduce watering in winter.

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Sunlight & Care

Prefers full sun to partial shade. Needs ample light for flowering.

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Fertilization

Apply balanced fertilizer in spring. Avoid excessive nitrogen which reduces flowering.

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Pruning

Remove spent flowers (deadheading) and old foliage to maintain shape and encourage blooming.

Pest Control Aphid Iris Weevil Spider Mite Thrip

These are the insects and pathogens that commonly interact with this plant, including pests, parasites, and organisms typically associated with its care.

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Seasonal Periods

local_florist Flowering Period 5 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
eco Leaf Persistence 12 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
thermostat

Growing Parameters

thermostat
Temperature
50° – 95°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
40% – 70%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
1000 – 40000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
5 – 35
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
water
Soil Moisture
20% – 50%
% volumetric
Water content in the growing medium
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Soil EC
300 – 1800
mS/cm
Electrical conductivity (nutrient concentration in soil water)

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