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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 Sep 18, 2011, appleflower from New York, NY wrote:
Two clumps of Siberian iris grow against the house on the north side (very shady) here at altitude 6800 feet altitude in northern New Mexico. The house is 6 years old and we have been here for 16 months. The flowers are lovely. The plants get no attention but they are irrigated from a cistern twice a week (15 minutes) for 4 months a year (we have a short season, average May 15-October 15).
I have been told that they will grow "anywhere" here. I'll try them in a sunny non-irrgated area first.
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-
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.
This plant has been said to grow in the following regions:
, Tallassee, Alabama Anchor Point, Alaska Auberry, California Fremont, California Broomfield, Colorado Mansfield Center, Connecticut Dallas, Georgia Marietta, Georgia Stone Mountain, Georgia Machesney Park, Illinois Mount Prospect, Illinois Spring Grove, Illinois Washington, Illinois Waukegan, Illinois Logansport, Indiana Mitchell, Indiana South Bend, Indiana Wichita, Kansas Lakeview Heights, Kentucky Lancaster, Kentucky Smiths Grove, Kentucky Cankton, Louisiana Harrison, Maine Lisbon, Maine Brookeville, Maryland Darnestown, Maryland Cordaville, Massachusetts Mashpee, Massachusetts Norton, Massachusetts Brighton, Michigan Kalamazoo, Michigan Pinconning, Michigan Saint Clair Shores, Michigan Fridley, Minnesota St Cloud, Minnesota Nelson, New Hampshire Ramblewood, New Jersey Canada De Los Alamos, New Mexico Galisteo, New Mexico Croton-on-hudson, New York Southold, New York Elizabeth City, North Carolina Winston-salem, North Carolina Dundee, Ohio Fruit Hill, Ohio Portland, Oregon Warrior Run, Pennsylvania West Kingston, Rhode Island India Hook, South Carolina Lawrenceburg, Tennessee Nashville, Tennessee Leesburg, Virginia Newport News, Virginia Powhatan, Virginia Wytheville, Virginia Beaux Arts Village, Washington Kalama, Washington North Sultan, Washington Huntington, West Virginia Marinette, Wisconsin Pulaski, Wisconsin Waterloo, Wisconsin Wittenberg, Wisconsin Johnstown, Wyoming Riverton, Wyoming