Species Iris, Japanese Roof Iris, Wall Iris
Iris tectorum
Family: | Iridaceae (eye-rid-AY-see-ee) (Info) |
Genus: | Iris (EYE-ris) (Info) |
Species: | tectorum (tek-TOR-um) (Info) |
Synonym: | Evansia tectorum |
Synonym: | Iris rosthornii |
Synonym: | Iris tomiolopha |
Class:
Species (SPEC)
Height:
12-18 in. (30-45 cm)
Spacing:
9-12 in. (22-30 cm)
Hardiness:
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
Sun Exposure:
Full Sun
Sun to Partial Shade
Danger:
Parts of plant are poisonous if ingested
Handling plant may cause skin irritation or allergic reaction
Bloom Color:
Dark Blue
Blue-Violet
Lavender
White/Near White
Bloom Time:
Late Midseason (MLa)
Foliage:
Herbaceous
Other details:
Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information:
Non-patented
Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)
Seed Collecting:
Allow pods to dry on plant; break open to collect seeds
Awards (if applicable):
Foliage Color:
Bloom Characteristics:
Water Requirements:
Average Water Needs; Water regularly; do not overwater
Where to Grow:
Grow outdoors year-round in hardiness zone
Can be grown as an annual
Regional
This plant is said to grow outdoors in the following regions:
Huntsville, Alabama
Montgomery, Alabama
Tuskegee, Alabama
Los Angeles, California
Stockton, California
Washington, District of Columbia
Gainesville, Florida
Austell, Georgia
Fayetteville, Georgia
Norcross, Georgia
Calvert City, Kentucky
Belleville, Michigan
Durham, North Carolina
Lake Toxaway, North Carolina
Liberty, North Carolina
Raleigh, North Carolina
Oklahoma City, Oklahoma
Tulsa, Oklahoma
Indiana, Pennsylvania
New Hope, Pennsylvania
Philadelphia, Pennsylvania
Wilkes Barre, Pennsylvania
Bluffton, South Carolina
Conway, South Carolina
Hartsville, South Carolina
Collierville, Tennessee
Pleasant View, Tennessee
Houston, Texas
Mechanicsville, Virginia
Virginia Beach, Virginia
Madison, Wisconsin
show allGardeners' Notes:
Rating | Content |
---|---|
Positive | On Nov 1, 2016, lunchladyk from Durham, NC wrote: This iris was along my walkway in Durham,NC when I moved into my house over 10 yrs ago and I have done absolutely nothing to it except cut back the foliage on occasion but not every spring. This flower grows wonderfully by itself without any help whatsoever! I don't even water it. It is the most beautiful shade of purple in the early Spring. I look forward to this gorgeous sea of color every year. This iris is VERY easy to transplant and grow even for the beginners. |
Neutral | On Mar 11, 2015, coriaceous from ROSLINDALE, MA wrote: Hardy to Z3-4. Highly susceptible to iris borer, more than bearded iris, so this needs to be regularly monitored. |
Positive | On Apr 3, 2012, kdmclynn from Washington, DC wrote: Planted our very first green, as in vegetated, roof over our sunroom back in the fall of 2008. Planted the usual sedums , but also planted a swath of tectorum, Roof Irises, including a few Iris tectorum 'Jimmy Stewart,' a white flowered cultivar. A 'Jimmy Stewart' iris was the very first to bloom that very first spring in 2009, followed by many more blooms. The irises have continued to thrive and we divided the clumps in the fall of 2011. |
Positive | On Sep 3, 2011, Mizfolia from Camrose, I have had great success growing " roof iris", I grew it from seed ( from |
Positive | On May 29, 2010, judyk from W Hartford, CT wrote: My favorite pass-along plant. Grows in sun or shade. Only care needed is to cut back old foliage in spring -- here in zone 5 the foliage persists thru the winter, unlike standard iris, which dies back and sprouts cleanly in spring. My variety is white and its blossoms remind me of the flying nun. Foliage is similar to standard iris but more graceful. Love it! |
Positive | On Apr 25, 2009, LiliMerci from North of Atlanta, GA (Zone 8a) wrote: They will bloom in the shade or sun, but the only iris I know of that blooms in the shade. |
Positive | On Nov 25, 2004, rainbeau from Connersville, IN wrote: PLANT THRIVES IN INDIANA CLIMATE. NEEDS LITTLE OR NO FEEDING. SUN OR PARTIAL SHADE WORK FINE. |
Positive | On Oct 12, 2003, docturf from Conway, SC (Zone 8b) wrote: The Japanese Roof Iris does very well in coastal South Carolina and provides an interesting "topic" plant. Mine was planted in 1990 and has thrived ever since with very little care and only 2 fertilizations during that period of time. |
Positive | On Oct 11, 2003, Terry from Murfreesboro, TN (Zone 7a) wrote: Roof Iris or Root Iris? Or is it a Wall Iris? |