Iris cristata

Dwarf Crested Iris

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Hardy groundcover perennial native to eastern North America. Features violet-blue crested blooms in spring and forms dense green mats in shade.
yard Outdoor plants wb_sunny Half-shade pets Not pet-safe
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Plant Details

Common Name Dwarf Crested Iris
Family Iridaceae
Genus Iris
Species Cristata
Origin Eastern North America
Blooming Early spring, violet-blue flowers with yellow crests
Leaf Color Bright green to blue-green
Sunlight Half-shade
Category Outdoor plants
Pet Friendly close No
yard

Care & Maintenance

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Soil

Moist, humus-rich, well-drained. Sandy loam with pH 6.0-7.5 ideal.

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Watering

Keep soil consistently moist during spring growth. Reduce after flowering. Dormancy requires dry cool conditions.

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Sunlight & Care

Prefers partial shade. Protect from harsh afternoon sun to prevent scorching rhizomes.

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Fertilization

Apply balanced slow-release fertilizer in early spring before new growth emerges. Avoid heavy nitrogen.

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Pruning

Cut back foliage to the ground after it yellows naturally in late autumn/early winter.

Pest Control Aphid Iris Borer Slug Snail

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 2 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
-13° – 86°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
30% – 70%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
400 – 10000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
500 – 2000
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
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Soil Moisture
20% – 60%
% volumetric
Water content in the growing medium
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Soil EC
300 – 1500
mS/cm
Electrical conductivity (nutrient concentration in soil water)

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