Tall Bearded Iris 'World Premier'


Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Cultivar: World Premier
Hybridized by Schreiner
Registered or introduced: 1998
» View all varieties of Iris


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:

Light Blue


Bloom Time:

Late Midseason (MLa)



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

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 (2 reports)

Arbuckle, California

Newbury Park, California

Gainesville, Georgia

Naperville, Illinois

Carmel, Indiana

Macy, Indiana

Cherryvale, Kansas

Salvisa, Kentucky

South Paris, Maine

Cut Bank, Montana

Beatrice, Nebraska

Lincoln, Nebraska

Lawton, Oklahoma

Myrtle Beach, South Carolina

Greeneville, Tennessee

Readyville, Tennessee

Madison, Wisconsin

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Gardeners' Notes:


On Jun 7, 2009, KSBaptisia from Beatrice, NE (Zone 5b) wrote:

World Premier has been a vigorous growing, strong blooming iris in my garden. Elegant flowers. One of the best


On May 20, 2008, gonzomamma from Arbuckle, CA (Zone 9a) wrote:

I highly recommend World Premier for hot climates. I'm in zone 9a. It's been blooming more than two months for me, and it still has a lot of tall stalks with big buds.

We had a late spring heat wave of a little over 100 degrees and almost all the other irises have fizzled out or look very sad.

This one is still standing tall and looking perfect. Very high bud count.


On Jun 2, 2006, MikenMyrtle from Myrtle Beach, SC wrote:

World Premiere's falls are a beautiful deep inky color--hard for me to capture accurately with the camera.


On Mar 19, 2006, Joan from Belfield, ND (Zone 4a) wrote:

Awards: American Iris Society Honorable Mention 2000; Award of Merit 2002; John C. Wister Medal 2004