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Tall Bearded Iris 'Amas'


Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Cultivar: Amas
Hybridized by Coll. by Foster, M., Sir
Registered or introduced: 1885
» 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

Handling plant may cause skin irritation or allergic reaction

Bloom Color:

Medium 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):

High Commendation

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:

, (2 reports)

Clanton, Alabama

Macy, Indiana

Cedar Rapids, Iowa

Durham, Maine

Gladwin, Michigan

Harlowton, Montana

Auburn, New Hampshire

Concord, North Carolina

Little Suamico, Wisconsin

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Gardeners' Notes:


On Dec 18, 2010, estrail1rider from Melfa, VA (Zone 8a) wrote:

Foster, collected 1885


On Jul 18, 2010, themikeman from Concord, NC (Zone 7a) wrote:

i moved into an old brick rural NC farm house and these were here alongside some violet iris pallida..these amas were apparently planted here by an elderly women back in the late 1950's. they arent as tall as the pallida 'violet sweet iris' but very beautiful contrast and also an even older heirloom iris variety too..just beautiful...mike


On Jul 6, 2008, Margiempv from Oro Valley, AZ (Zone 9a) wrote:

Amas is of Asiatic early blooming Germanica Tall Bearded.

Other names it is has been known by are: Amasia, Amos, Artindale, Macrantha, William Tell, and William III. First mentioned in 1885 - being called Amasia at that time.


On May 26, 2005, Mainecoon from Shepherd, MT wrote:

Amas is a very hardy plant


On Jun 15, 2003, carolann from Auburn, NH wrote:

Collected in Turkey in the mid-1800s; (some sources indicate it by Foster and pinpoint the year as 1885); a tetraploid used extensively in Iris breeding.