Tall Bearded Iris 'Mesmerizer'


Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Cultivar: Mesmerizer
Hybridized by Byers
Registered or introduced: 1990
» View all varieties of Iris


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:

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

Dykes Memorial Medal

John C. Wister Memorial Medal (TB)

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:


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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Gardeners' Notes:


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!


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.


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


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.


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

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