Tall Bearded Iris 'Lent A. Williamson'


Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Cultivar: Lent A. Williamson
Hybridized by Williamson
Registered or introduced: 1918
» 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:

Fuchsia (Red-Purple)


White/Near White

Bloom Time:

Early midseason (EM)



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):

Award of Merit

Historic/Retired Awards No Longer Distributed (See Comments)

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:

Rock Falls, Illinois

Williamsville, Illinois

Carmel, Indiana

Fort Wayne, Indiana

Iowa City, Iowa

Durham, Maine

Robertsville, Missouri

Newfoundland, New Jersey

Kingston, New York

Concord, North Carolina

Anacortes, Washington

Tacoma, Washington

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Gardeners' Notes:


On Mar 2, 2012, LauraSteele from Fort Wayne, IN wrote:

From the 1928 Lee R. Bonnewitz Iris and Peony catalog of Van Wert, Ohio:
LENT A. WILLIAMSON (Williamson). One of the very best Irises in the world. The standards are broad and of a soft lavender-violet. The very large falls are of velvety royal-purple, and it has a brilliant orange beard. This wonderful Iris certainly deserves a color plate, and when it can be shown in all its beauty, we believe it will be one of the best selling varieties. Excellent for landscape use and also for interior decoration. $0.75


On Nov 11, 2008, hespiris from Kingston, NY (Zone 5b) wrote:

Introduced prior to 1920 when AIS was formed, this iris received it's awards from the both the national societies of France (CM 1924) and England (AM 1929).

While a handsome bloom initially, here it gets a bit dull looking in a short time.... and that phase lasts awhile. I have tried it up-front, in the back, now out to the roadside. But I do keep trying to find the right spot for it!


On Mar 8, 2007, girlndocs from Tacoma, WA wrote:

A tried and true variety I often see in older gardens. Rescued my rhizomes from a bulldozed home site and watched them grow into a healthy clump in two years; these guys are survivors. The blooms are faintly fragrant and there are numerous blooms on each stalk.