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Hardiness: USDA Zone 4a: to -34.4 °C (-30 °F) USDA Zone 4b: to -31.6 °C (-25 °F) USDA Zone 5a: to -28.8 °C (-20 °F) 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
Danger: Parts of plant are poisonous if ingested
Bloom Color: Light Blue Medium Blue Dark Blue White/Near White
Bloom Time: Late Midseason (MLa)
Foliage: Herbaceous Smooth-Textured
Other details: Average Water Needs; Water regularly; do not overwater
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
On Oct 24, 2009, Joan from Belfield, ND (Zone 4a) wrote:Editor's Note
Rhizomes (thickened roots) and rootstocks, fresh or dry, of all Iris species and cultivars are poisonous if ingested. Symptoms include nausea, vomiting, abdominal pain, diarrhea and elevated temperature following ingestion. Some resources claim the toxic principal (irisin, iridin, irisine) only cause low toxicity if eaten.
Skin irritation can develop upon contact with seeds, rhizomes, rootstock, or cell sap.
We tend to err on the side of caution in PlantFiles, and the danger notation in the details above is to warn gardeners, parents, and pet owners to look further for more information.
On May 14, 2005, henryr10 from Cincinnati, OH (Zone 6b) wrote:
I'm not a fan of the big 'beards'.
(Maybe because we grew hundreds when I was a kid. lol)
This much more dainty and fragile looking Iris is more to my liking.
They may look dainty and fragile but definitely aren't.
Our clump has been here at least 40 years.
Buried in the back under a weedy Wisteria vine for at least 20 years it sprang back beautifully when released.
We divided it last Fall and forgot a clump.
It over-wintered in a pan of water.
On Jan 17, 2005, LilyLover_UT from Ogden, UT (Zone 5b) wrote:
This gorgeous perennial has been very easy for me to grow. I haven't had any pest problems. It can withstand some drought and poor soil, although I'm sure it would do better in moist soil. I've also grown it as a pond plant on a shallow ledge. Siberian iris has a short bloom season, and it appreciates some afternoon shade when blooming, since the flowers are fragile.
Susceptible to iris borer. The moths lay
their eggs in the leaves and the young
tunnel down the leaves to hollow out the
rhizome. Borers also spread bacterial rot,
which kills the iris from the ground up.
Good culture is the best preventive. Re-
move dead foliage in spring and fall. Smash
the grubs between your fingers while they
are in the leaves. Dig up affected plants
and cut off affected portions of the rhiz-
ome.
On Aug 10, 2001, eyesoftexas from Toadsuck, TX (Zone 7a) wrote:
This versatile iris is suitable for a herbaceous border as well as the margins of an informal pond. The slender, sword-like, midgreen leaves die down in winter. The flowers are about 2 1/2 inches wide and are borne during midsummer. In the original species, they are in various shades of blue with white veining on the falls. Because the original species hybridizes freely, only hybrids are usually available.
Cultivation: Grows best in moist soil, but will also perform well in a herbaceous border, where it usually does not grow so high. lant rhizomes 1 inch deep in the soil in autumn or spring.
Propagation: Easily increased by lifting and dividing every four to five years.
Regional...
This plant has been said to grow in the following regions:
Tallassee, Alabama Anchor Point, Alaska Auberry, California Fremont, California Dallas, Georgia Marietta, Georgia Stone Mountain, Georgia Machesney Park, Illinois Mount Prospect, Illinois Spring Grove, Illinois Mitchell, Indiana Lancaster, Kentucky Morehead, Kentucky Sunset, Louisiana Lisbon, Maine Brookeville, Maryland Gaithersburg, Maryland Mashpee, Massachusetts Norton, Massachusetts Southborough, Massachusetts Brighton, Michigan Pinconning, Michigan Saint Clair Shores, Michigan Minneapolis, Minnesota Saint Cloud, Minnesota Munsonville, New Hampshire Croton On Hudson, New York Elizabeth City, North Carolina Winston Salem, North Carolina Cincinnati, Ohio Dundee, Ohio Portland, Oregon Watsontown, Pennsylvania Rock Hill, South Carolina Newport News, Virginia Powhatan, Virginia Wytheville, Virginia Kalama, Washington Sultan, Washington Huntington, West Virginia Marinette, Wisconsin Pulaski, Wisconsin Waterloo, Wisconsin Wittenberg, Wisconsin
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