Tall Bearded Iris 'Gnus Flash'


Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Cultivar: Gnus Flash
Hybridized by Kasperek
Registered or introduced: 1994
» View all varieties of Iris


Tall Bearded (TB)


36-48 in. (90-120 cm)


12-15 in. (30-38 cm)

15-18 in. (38-45 cm)

18-24 in. (45-60 cm)


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


Parts of plant are poisonous if ingested

Handling plant may cause skin irritation or allergic reaction

Bloom Color:




Bloom Time:

Early (E)



Other details:

Unknown - Tell us

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:


Propagation Methods:

By dividing rhizomes, tubers, corms or bulbs (including offsets)

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

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Flowers are fragrant

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


This plant has been said to grow in the following regions:

Tucson, Arizona (2 reports)

Harrison, Arkansas

Antioch, California

Grand Junction, Colorado

Genoa, Illinois

Saint Charles, Illinois

Cherryvale, Kansas

Revere, Massachusetts

Robertsville, Missouri

South Sioux City, Nebraska

Las Vegas, Nevada

Los Alamos, New Mexico

Roswell, New Mexico

Lake Placid, New York

Belfield, North Dakota

Coshocton, Ohio

Oklahoma City, Oklahoma

Readyville, Tennessee

Portsmouth, Virginia

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Gardeners' Notes:


On Jan 4, 2015, Carboytony826 from Revere, MA (Zone 6b) wrote:

This has turned out to be one of my favorite Irises. It bloomed the first year it was planted and it was a stunner. I had neighbors coming over to compliment me on it's beauty!


On Jun 10, 2011, 500Greenthumb from South Sioux City, NE wrote:

I have removed Gnu's Flash from my garden. Every year it falls over because the stalks are weak . An iris is no good to me if it's laying on the ground. The bloom also seems to lose its shape quickly . The bloom is wide open by the second day and all you see are style arms.


On Jan 11, 2009, pajaritomt from Los Alamos, NM (Zone 5a) wrote:

This has turned out to be one of my favorite irises. It bloomed for me the first time last year and I entered the stalk in a show, my first ever. I knew nothing about showing iris, but I got a ribbon with it anyhow. I love its appearance and its ease of growth.


On Jan 7, 2009, ToughinLasVegas from Reno, NV (Zone 8b) wrote:

This was my first color break iris and I love it, not only for the beautiful blooms but the tongue in cheek name.


On Mar 14, 2006, Margiempv from Oro Valley, AZ (Zone 9a) wrote:

Great growing broken color iris. It has even rebloomed for me!!


On Dec 12, 2005, Joan from Belfield, ND (Zone 4a) wrote:

American Iris Society Honorable Mention '98, Award of Merit '00


On Nov 27, 2005, ADKSpirit from Lake Placid, NY (Zone 4a) wrote:

There are Iris I choose for their appearance, and those that I choose for their name alone. This one I chose for both reasons. It has proved to be quite the crowd pleaser with people who walk by on the sidewalk, both because of the color, and for the length of it's bloom time. The flowers are huge, and at one point I had to stake one stalk because it was so top heavy. I'd recommend this one for anyone looking for something a little different.


On May 6, 2005, dbknread from Harrison, AR wrote:

This is doing very well here in northern Arkansas. A nice edition to any iris collection. Light tan standards with violet infused midribs. Streaked silver-white. Falls dark violet with creamy white streaks. Yellow beards. Color description according to Cooley' Garden.