Tall Bearded Iris 'Conjuration'


Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Cultivar: Conjuration
Hybridized by Byers
Registered or introduced: 1988
» 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)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:

Sun to Partial Shade


Parts of plant are poisonous if ingested

Handling plant may cause skin irritation or allergic reaction

Bloom Color:


White/Near White

Bloom Time:

Midseason (M)

Late Midseason (MLa)

Late (La)



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:

Unknown - Tell us

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

Vail, Arizona

Bakersfield, California

Emerald Lake Hills, California

Stanford, California

Fowler, Colorado

Monroe, Connecticut

Chicago, Illinois

Westchester, Illinois

Macy, Indiana

Cedar Rapids, Iowa

Oskaloosa, Kansas

Hebron, Kentucky

Anacoco, Louisiana

Durham, Maine

Finksburg, Maryland

Hagerstown, Maryland

Preston, Maryland

West Springfield, Massachusetts

Belleville, Michigan

Clawson, Michigan

Tupelo, Mississippi

Robertsville, Missouri

Saint Louis, Missouri

Shepherd, Montana

Auburn, New Hampshire

Greenfield, New Hampshire

Salem, New Jersey

Los Alamos, New Mexico

Santa Teresa, New Mexico

Concord, North Carolina

Lawton, Oklahoma

Oklahoma City, Oklahoma

Thackerville, Oklahoma

Salem, Oregon (2 reports)

Elizabethton, Tennessee

Greeneville, Tennessee

Bryan, Texas

Harker Heights, Texas

Lubbock, Texas

Portsmouth, Virginia

Chewelah, Washington

Madison, Wisconsin

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Gardeners' Notes:


On Oct 18, 2006, RobertWM from Clawson, MI wrote:

A terrific grower and heavy bloomer, it usually starts my iris bloom season and comes close to finishing it. It gets very tall for me (often reaches 52"), and has bright, orchid-like colors which show up all the way across the yard. Not every Dykes medal winner seems to deserve its award but this one deserves every honor it's received. A standout!


On Feb 17, 2006, TBGDN from (Zone 5a) wrote:

CONJURATION: (Monty Byers, R. 1988). Sdlg. D1-1. TB 36" (91 cm) M-L. "S. white, edge lightly infused pale violet blue; F. white, suffusing to deep bright amethyst violet edge; white beard tipped tangerine; fuzzy white horns; ruffled. B-37-10: (Sky Hooks x Condottiere) X Alpine Castle., Moonshine Gardens 1989. HM 1991, AM 1994, Wister 1998, Dykes 1998". Very tall stems; usually stands at 38-42". Good garden habits, no hardiness problems here.


On Dec 26, 2005, Joan from Belfield, ND (Zone 4a) wrote:

Awards: American Iris Society Honorable Mention 1991, Award of Merit 1994, John C. Wister Medal 1998, Dykes Medal 1998


On Dec 2, 2004, Margiempv from Oro Valley, AZ (Zone 9a) wrote:

Dykes Medal Winner. Good grower. It is nice and tall, with great branching and color. Dependable blooms every year.