Photo by Melody

PlantFiles: Tall Bearded Iris
Iris 'Mesmerizer'

Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Cultivar: Mesmerizer
Hybridized by Byers; Year of Registration or Introduction: 1990

» View all varieties of Iris

7 members have or want this plant for trade.

Tall Bearded (TB)

24-36 in. (60-90 cm)
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

Bloom Color:
White/Near White

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 Ruth_V
Thumbnail #1 of Iris  by Ruth_V

By Ruth_V
Thumbnail #2 of Iris  by Ruth_V

By Margiempv
Thumbnail #3 of Iris  by Margiempv

By cathysplants
Thumbnail #4 of Iris  by cathysplants

By Tntigger
Thumbnail #5 of Iris  by Tntigger

By Terri1948
Thumbnail #6 of Iris  by Terri1948

By grannymarsh
Thumbnail #7 of Iris  by grannymarsh

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


3 positives
2 neutrals
No negatives

Gardeners' Notes:

Positive no_regrets On Dec 21, 2014, no_regrets from San Diego, CA wrote:

Planted 3 different types of reblooming bearded iris in an area of our property that gets absolutely baking sun during the summer. Even drought-tolerant plants have a tough time surviving the heat, despite the fact that we have automatic drip irrigation set up. The other two types of iris are barely limping along but Mesmerizer has exploded in size and basically bloomed all spring and all fall, with a brief pause during the hottest part of the summer. It's now the end of December and it's still going strong! The clump, started with just three rhizomes, is so big that I may need to think about dividing it next summer already (I just planted them last fall, about 14 months ago). Unbelievable!

Positive DGcnm On Jun 8, 2011, DGcnm from Corrales, NM wrote:

Highly recommended. Although a few buds froze from a
very late freeze, Others came on and bloomed later (ML).
The tallest in my garden, long lasting and a pleaser.

Neutral Joan On Mar 25, 2006, Joan from Belfield, ND (Zone 4a) wrote:

American Iris Society Awards: Honorable Mention 1993; Award of Merit 1996; John C. Wister Medal 2000; Dykes Medal 2002

Neutral doss On Mar 15, 2005, doss from Stanford, CA (Zone 9b) wrote:

(Byers, 91) Mid Season. 36"
"Soft ruffled white. Beards are white at ends, blending to yellow then tangerine in the throat with huge uplifted frilly white flounces." This Iris was awarded the American Iris Society Honorable Mention '93; Award of Merit '96; and the Wister medal '00. The Wister Medal is the highest award for a tall bearded Iris. The Iris must win both the HM and AM to be eligible for the Wister.

Positive Margiempv On Nov 29, 2003, Margiempv from Oro Valley, AZ (Zone 9a) wrote:

Good grower, quite mesmerizing! Occasionally the stalks will fall over.


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

Phoenix, Arizona
Tucson, Arizona (2 reports)
Apple Valley, California
Escondido, California
Los Altos, California
Montara, California
Monroe, Connecticut
Hagerstown, Maryland
Preston, Maryland
Sandwich, Massachusetts
Cedar Springs, Michigan
Robertsville, Missouri
Lincoln, Nebraska
Las Vegas, Nevada
Corrales, New Mexico
Lawton, Oklahoma
Sarver, Pennsylvania
Greeneville, Tennessee
Portsmouth, Virginia

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