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Tall Bearded Iris 'Absolute Treasure'


Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Cultivar: Absolute Treasure
Hybridized by Tasco
Registered or introduced: 2005
» 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

Medium Blue

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)

Allow cut surface to callous over before planting

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

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:

Vail, Arizona

Bakersfield, California

Atlanta, Georgia

Macy, Indiana

Tupelo, Mississippi

Robertsville, Missouri

Las Cruces, New Mexico

Lawton, Oklahoma

Simpsonville, South Carolina

Greeneville, Tennessee

Blossom, Texas

show all

Gardeners' Notes:


On Apr 26, 2016, smcatl from Atlanta, GA wrote:

Whoa! It really is blue! Lavenderish blue rather than sky blue, but still definitely BLUE. I'm delighted with the color and form of this iris. This is its first year, so I've only gotten one scape, but it bears several buds. The first bloom opened yesterday, which puts its start about a week later than most of my mid-season irises here in Atlanta.


On May 6, 2014, MatildaW from Melbourne,
Australia wrote:

The John C. Wister Medal - 2013


On Apr 19, 2014, eolivas103 from Las Cruces, NM (Zone 8a) wrote:

I was after a very blue Iris and had reserached this site, gardening blogs, etc; to find what types others thought were the bluest. This one was one that was listed often and I am very happy with the color. Yes, it is an absolute treasure. It's tall. It's at approx 36" and this is a first season blooming. Planted Fall 2013 and Bloomed this Spr 2014.


On Jul 25, 2008, Joan from Belfield, ND (Zone 4a) wrote:

Awards: Honorable Mention 2008