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Tall Bearded Iris 'Louisa's Song'


Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Cultivar: Louisa's Song
Hybridized by Blyth
Registered or introduced: 1999
» 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

Bloom Color:


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):

Unknown - Tell us

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:

Tucson, Arizona

Bakersfield, California

Paradise, California

Monroe, Connecticut

Hebron, Kentucky

Ventress, Louisiana

South Sioux City, Nebraska

Lawton, Oklahoma

Grants Pass, Oregon

Bluffton, South Carolina

Greeneville, Tennessee

Blossom, Texas

Pleasant Grove, Utah

show all

Gardeners' Notes:


On Aug 18, 2009, Marilynbeth from Hebron, KY wrote:

"Description courtesy of Barry Blyth, used by permission"

Louisa's Song

(Blyth 99 Aust) EM 42"

One of the loveliest tall bearded Iris that we have raised. Standards are lilac-orchid. Falls are red-lavender to orchid-lavender with 1/4in blended lilac edge. Beards are bright tangerine. Huge blooms with lace and ruffles galore. Fine branching with at least four flowering points. Superb parent with many varieties registered from its seedlings.

(Cloud Berry X About Town)


On Mar 25, 2006, Margiempv from Oro Valley, AZ (Zone 9a) wrote:

A decent steady grower. Does not get as tall here as it does in Australia; But lovely just the same.