Photo by Melody

PlantFiles: Tall Bearded Iris
Iris 'Thornbird'

Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Cultivar: Thornbird
Hybridized by Byers; Year of Registration or Introduction: 1988

» View all varieties of Iris

21 members have or want this plant for trade.

Tall Bearded (TB)

24-36 in. (60-90 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:
Midseason (M)


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
Dykes Memorial Medal
John C. Wister Memorial Medal (TB)

Click thumbnail
to view:

By carolann
Thumbnail #1 of Iris  by carolann

By aecrowell
Thumbnail #2 of Iris  by aecrowell

By Margiempv
Thumbnail #3 of Iris  by Margiempv

By rwbigfoot
Thumbnail #4 of Iris  by rwbigfoot

Thumbnail #5 of Iris  by EROCTUSE2

By carolann
Thumbnail #6 of Iris  by carolann

By jfrizzell
Thumbnail #7 of Iris  by jfrizzell

There are a total of 52 photos.
Click here to view them all!


3 positives
1 neutral
No negatives

Gardeners' Notes:

Positive disterheft On Apr 16, 2011, disterheft from Columbia, SC wrote:

A stunning iris and a good increaser, as already noted. Profuse bloomer with great curb appeal (that's what I call it when my neighbors stop their cars to get a better look). Unusual yellowy-tan background, brownish-maroon marking on shoulders, high contrast with maroon-fading-to-gold horns. I have it planted next to Lady Friend and in front of Dynamite for complementary colors.

Neutral Joan On Dec 16, 2005, Joan from Belfield, ND (Zone 4a) wrote:

Awards: American Iris Society Honorable Mention '91, Award of Merit '93, Wister Medal '96, Dykes Medal '97

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

I'll admit I've never met an iris I didn't like, but this is one of my all time favorites. I would have to include it in my top ten. The color is exquisite, and it produced beautifully the first year. Bloom time up here was the middle of June.

Positive Margiempv On Dec 13, 2003, Margiempv from Oro Valley, AZ (Zone 9a) wrote:

Excellent grower, good increaser - all around great iris!


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

, (2 reports)
Tucson, Arizona (2 reports)
San Jose, California
San Leandro, California
Sebastopol, California
Montrose, Colorado
Milford, Connecticut
Monroe, Connecticut
Gainesville, Georgia
Naperville, Illinois
Cedar Rapids, Iowa
Manhattan, Kansas (2 reports)
Barbourville, Kentucky
Lexington, Kentucky
Gardiner, Maine
South Paris, Maine
Chelsea, Michigan
Jackson, Mississippi
Alton, Missouri
Robertsville, Missouri
Bridger, Montana
Harlowton, Montana
Shepherd, Montana
Toston, Montana
Lincoln, Nebraska
Reno, Nevada
Auburn, New Hampshire
Keansburg, New Jersey
Salem, New Jersey
Corrales, New Mexico
Lake Placid, New York
Coshocton, Ohio
Milan, Ohio
Lawton, Oklahoma
Ponca City, Oklahoma
Thackerville, Oklahoma
Columbia, South Carolina
Celina, Tennessee
Greeneville, Tennessee
Lawrenceburg, Tennessee
Austin, Texas
Portsmouth, Virginia
Winchester, Virginia
Madison, Wisconsin

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