Photo by Melody

PlantFiles: Tall Bearded Iris
Iris 'Gnus Flash'

Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Cultivar: Gnus Flash
Hybridized by Kasperek; Year of Registration or Introduction: 1994

» View all varieties of Iris

18 members have or want this plant for trade.

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:
Flowers are fragrant
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:

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

Click thumbnail
to view:

By patnjbob
Thumbnail #1 of Iris  by patnjbob

By Margiempv
Thumbnail #2 of Iris  by Margiempv

By flowerfrenzy
Thumbnail #3 of Iris  by flowerfrenzy

By dbknread
Thumbnail #4 of Iris  by dbknread

By ADKSpirit
Thumbnail #5 of Iris  by ADKSpirit

By Margiempv
Thumbnail #6 of Iris  by Margiempv

By daylily970
Thumbnail #7 of Iris  by daylily970

There are a total of 19 photos.
Click here to view them all!


6 positives
1 neutral
1 negative

Gardeners' Notes:

Positive Carboytony826 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!

Negative 500Greenthumb 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.

Positive pajaritomt 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.

Positive ToughinLasVegas On Jan 7, 2009, ToughinLasVegas from Las Vegas, 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.

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

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

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

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

Positive ADKSpirit 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.

Positive dbknread 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.


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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