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Family: Iridaceae (eye-rid-AY-see-ee) (Info) Genus: Iris (EYE-ris) (Info) Cultivar: Silverado Hybridized by Schreiner; Year of Registration or Introduction: 1986
Spacing: 12-15 in. (30-38 cm) 15-18 in. (38-45 cm) 18-24 in. (45-60 cm)
Hardiness: USDA Zone 3a: to -39.9 °C (-40 °F) USDA Zone 3b: to -37.2 °C (-35 °F) 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)
Sun Exposure: Full Sun
Danger: Parts of plant are poisonous if ingested Handling plant may cause skin irritation or allergic reaction
Bloom Color: Light Blue White/Near White
Bloom Time: Midseason (M)
Foliage: Herbaceous
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) Allow cut surface to callous over before planting
Seed Collecting: N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
Awards (if applicable): Honorable Mention Award of Merit Dykes Memorial Medal John C. Wister Memorial Medal (TB)
On May 19, 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 Feb 18, 2006, TBGDN from Macy, IN (Zone 5b) wrote:
This is (in my opinion) probably Schreiners crowning achievement in irises. Not to diminish any of their other accomplishments in iris hybridizing, this one has all the great qualities and beautiful good looks every iris collector waits for. If I had to give up all the irises I grow except for ten, this one would be first of them to stay! If form, balance, color, growth, bloom habits, increase and winter hardiness are all taken into consideration, this one will be hard to beat! An outstanding iris!
On Mar 22, 2005, doss from Stanford, CA (Zone 9b) wrote:
'Silverado' has an Early to Mid season bloom. 38"
This highly recognized Iris has won every award the American Iris Society gives to Tall Bearded Iris. 'Silverado' won the Highly Commended '86; Honorable Mention '89; Award of Merit '91; Wister Medal '93;
Dykes Medal '94.
In order to win the Dykes Medal, the Iris must have won every other award, except the Highly Commended. Only recently has the Wister Medal - the highest award for the Tall Bearded Iris - been required for the Dykes Medal. I doubt that this was the case in 1994.
On Dec 18, 2003, mountaineer from Manhattan, KS wrote:
This is a outstanding Iris. I could not believe the number of blooms it has. Each stock has 7 or 8 with lots of stocks. It is absolutely gorgeous when it blooms mid season in zone 5.
Regional...
This plant has been said to grow in the following regions:
Tucson, Arizona Boise, Idaho Niles, Illinois Macy, Indiana Cedar Rapids, Iowa Preston, Maryland Belleville, Michigan Blanchard, Michigan Deer River, Minnesota Robertsville, Missouri Beatrice, Nebraska Auburn, New Hampshire Los Alamos, New Mexico Lawton, Oklahoma Grants Pass, Oregon Conway, South Carolina Greeneville, Tennessee Lubbock, Texas Portsmouth, Virginia Marysville, Washington Selah, Washington
9 members have or want this plant for trade.
