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Native alternative(s) for Iris tectorum:
Iris virginica Iris virginica
Plants that fill a similar niche:
Iris germanica Iris germanica in the spring in Moore County
Aconitum Aconitum spp.
Sisyrinchium angustifolium Sisyrinchium angustifolium
Iris tectorum has some other problems:
Slugs and Snails Found on Flowers and Foliage

Iris tectorum

Phonetic Spelling
EYE-riss tek-TOR-um
This plant has low severity poison characteristics.
See below
Description

This interesting member of the crested iris group is beardless, but the falls are marked by a fringed crest of white on purple. Japanese roof iris are an example of the great diversity of exotic Iris species coming into the nursery industry with varied colors and flower formations. Though the bloom is large at 6 inches, the standards are shortened and tubular and the falls widespread.  The leaves are 15 inches tall, fanned at the base and ribbed.  The rhizomes should be spaced 10-16 inches apart planted at 1-2 inches deep and will mature at soil level.  They prefer a sunny to part-shade location in rich, well-drained soil and benefit from the shelter of a wall with western or southern exposure and winter mulch. Japanese roof iris is also useful in wet areas, such as around ponds and fountains.  But they do not require a great deal of water so they can be used in rock gardens.  As the rhizomes spread, this iris can be used for naturalizing and mass planting.  The common name is derived from the historical use on thatched roofs in its native China and Japan.  

These iris tolerate drought and deer but are prone to slugs and virus.  Infected plants with darkened leaves should be removed and destroyed.  The seeds do not harbor the infection.

More information on Iris.

Cultivars / Varieties:
  • 'Alba'
Tags:
#purple#sun#showy flowers#poisonous#partial shade#summer#blue#lavender#perennial#white flowers#cut flowers#shelter#pond margins#cpp#rhizomes#groundcover#naturalizes
 
Cultivars / Varieties:
  • 'Alba'
Tags:
#purple#sun#showy flowers#poisonous#partial shade#summer#blue#lavender#perennial#white flowers#cut flowers#shelter#pond margins#cpp#rhizomes#groundcover#naturalizes
  • Attributes:
    Genus:
    Iris
    Species:
    tectorum
    Family:
    Iridaceae
    Life Cycle:
    Perennial
    Recommended Propagation Strategy:
    Division
    Country Or Region Of Origin:
    China
    Play Value:
    Attractive Flowers
    Particularly Resistant To (Insects/Diseases/Other Problems):
    Deer
    Dimensions:
    Height: 1 ft. 0 in. - 1 ft. 6 in.
    Width: 1 ft. 0 in. - 1 ft. 6 in.
  • Whole Plant Traits:
    Plant Type:
    Ground Cover
    Perennial
    Poisonous
    Growth Rate:
    Medium
    Maintenance:
    Low
  • Cultural Conditions:
    Light:
    Full sun (6 or more hours of direct sunlight a day)
    Partial Shade (Direct sunlight only part of the day, 2-6 hours)
    Soil Texture:
    High Organic Matter
    Soil pH:
    Acid (<6.0)
    Soil Drainage:
    Good Drainage
    Available Space To Plant:
    12 inches-3 feet
    NC Region:
    Coastal
    Mountains
    Piedmont
    Usda Plant Hardiness Zone:
    4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b
  • Fruit:
    Fruit Description:
    capsule
  • Flowers:
    Flower Color:
    Blue
    Pink
    Purple/Lavender
    Variegated
    White
    Flower Value To Gardener:
    Good Cut
    Showy
    Flower Bloom Time:
    Spring
    Flower Shape:
    Irregular
    Flower Petals:
    6 petals/rays
    Flower Size:
    > 6 inches
    Flower Description:
    6" flowers with 3 short, tubular, upright standards, 3 spreading, pendant falls, and white crests
  • Leaves:
    Leaf Color:
    Green
    Leaf Feel:
    Smooth
    Leaf Shape:
    Lanceolate
    Hairs Present:
    No
    Leaf Description:
    Knife-like, narrow, ribbed to 15" long, spreading at base
  • Stem:
    Stem Is Aromatic:
    No
  • Landscape:
    Problems:
    Poisonous to Humans
  • Poisonous to Humans:
    Poison Severity:
    Low
    Poison Symptoms:
    CAUSES ONLY LOW TOXICITY IF EATEN. SKIN IRRITATION MINOR, OR LASTING ONLY FOR A FEW MINUTES. Nausea, vomiting, abdominal pain, diarrhea, elevated temperature following ingestion; skin irritation upon contact with seeds, rootstock, or cell sap.
    Poison Toxic Principle:
    irisin, iridin, or irisine
    Causes Contact Dermatitis:
    Yes
    Poison Part:
    Roots
    Sap/Juice
    Seeds