Photo by Melody

PlantFiles: Tall Bearded Iris
Iris 'Flavescens'

Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Cultivar: Flavescens
Hybridized by De Candolle; Year of Registration or Introduction: 1813

» View all varieties of Iris

One vendor has this plant for sale.

12 members have or want this plant for trade.

Tall Bearded (TB)

24-36 in. (60-90 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:
Pale Yellow
Chartreuse (Yellow-Green)

Bloom Time:
Early (E)


Other details:
Flowers are fragrant
Average Water Needs; Water regularly; do not overwater

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):
Unknown - Tell us

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By deechicktwo
Thumbnail #1 of Iris  by deechicktwo

By Mainer
Thumbnail #2 of Iris  by Mainer

Thumbnail #3 of Iris  by EROCTUSE2

By winnietn
Thumbnail #4 of Iris  by winnietn

By sarajute
Thumbnail #5 of Iris  by sarajute

By Polyacre
Thumbnail #6 of Iris  by Polyacre

By laurawege
Thumbnail #7 of Iris  by laurawege

There are a total of 9 photos.
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1 positive
No neutrals
No negatives

Gardeners' Notes:

Positive themikesmom On Dec 15, 2012, themikesmom from Concord, NC wrote:

'Flavescens' De Condolle 1813. It is 27'' tall and has an Early Bloomtime, it is an species iris from Switzerland where it was discovered, and surrounding alpine regions of Austria, France, and northern Italy . According to historical botanists at Thomas Jefferson's Monticello, although it was registered by De Condolle in 1813, this species iris I. flavescens, was first published in literature along with I. pallida in the book 'Florilegium' by Emmanuel Sweert of collected wild species in 1612. It was brought to America in 1854 by Nurseryman: 'William Prince' of New York and appeared in his first book as his most prized iris. This iris is a fast multiplier and looks best in mass plantings. In the rural United States, it is referred to as 'Lemon Yellow Iris' due to its fragrance and also old fashioned 'yellow country iris'. According to the USDA it has taken over as wild rhizome colonies in many parts of Kansas where it has multiplied on many old farms, fields, and abandoned homesites, where these large plantings are referred to as 'Triumphant Swaths.'


This plant has been said to grow in the following regions:

Colorado Springs, Colorado
Boise, Idaho
Williamsville, Illinois
Durham, Maine
Brewster, Massachusetts
Ware, Massachusetts
Wayland, Massachusetts
Saint Paul, Minnesota
Harlowton, Montana
Shepherd, Montana
Cobleskill, New York
Concord, North Carolina
Gold Hill, Oregon
Warwick, Rhode Island
Rapid City, South Dakota
Celina, Tennessee
Greeneville, Tennessee
Galax, Virginia

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