Butterfly Bush, Summer Lilac, Orange-eye Butterfly Bush 'Nanho Blue'

Buddleja davidii var. nanhoensis

Family: Buddlejaceae
Genus: Buddleja (BUD-lee-uh) (Info)
Species: davidii var. nanhoensis
Cultivar: Nanho Blue
Synonym:Buddleia davidii var. nanhoensis



Foliage Color:


Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


4-6 ft. (1.2-1.8 m)


4-6 ft. (1.2-1.8 m)


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)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:

Full Sun


Pollen may cause allergic reaction

Bloom Color:

Medium Blue


Bloom Time:

Mid Summer

Late Summer/Early Fall

Mid Fall


Unknown - Tell us

Other details:

Unknown - Tell us

Soil pH requirements:

6.6 to 7.5 (neutral)

Patent Information:

Unknown - Tell us

Propagation Methods:

By simple layering

By air layering

Seed Collecting:

Bag seedheads to capture ripening seed

Collect seedhead/pod when flowers fade; allow to dry

Allow seedheads to dry on plants; remove and collect seeds


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


Pelham, Alabama

Hot Springs National Park, Arkansas

Morrilton, Arkansas

Brea, California

Lake Nacimiento, California

Long Beach, California

Martinez, California

Menifee, California

Quincy, Florida

Saint Cloud, Florida

Welaka, Florida

Dacula, Georgia

Douglas, Georgia

Marietta, Georgia

Winston, Georgia

South Bend, Indiana

Des Moines, Iowa

Iowa City, Iowa

Clay Center, Kansas

Olathe, Kansas

Hebron, Kentucky

Leeds, Massachusetts

Ludington, Michigan

Royal Oak, Michigan

Conway, Missouri

Exeter, New Hampshire

Lanoka Harbor, New Jersey

Point Pleasant Beach, New Jersey

Ossining, New York

Cary, North Carolina

Greenville, North Carolina

Mars Hill, North Carolina

Weaverville, North Carolina

Defiance, Ohio

Latta, South Carolina

North Augusta, South Carolina

Abilene, Texas

Alice, Texas

Austin, Texas

Corpus Christi, Texas

Dallas, Texas

Fort Worth, Texas (2 reports)

Irving, Texas

Lincoln, Texas

Port Arthur, Texas

Spring Branch, Texas

Harrisonburg, Virginia

Grand Mound, Washington

Madison, Wisconsin

Riverton, Wyoming

show all

Gardeners' Notes:


On Jun 26, 2014, homespie01 from Corpus Christi, TX (Zone 9a) wrote:

Has anyone heard of the nanho blue reverting to white? I could swear I planted a blue one last year, but as soon as winter was over, it started blooming white. The blooms got super large, and its growth exploded.


On Nov 20, 2006, Marilynbeth from Hebron, KY wrote:

I love it! It is beautiful and try to keep it pinched back for compactness and keep it deaded for more blooms.


On Nov 25, 2004, smiln32 from Oklahoma City, OK (Zone 7a) wrote:

This variety of butterfly bush is a lovely shade of blue.

In cooler zones, Buddleias die back to the ground each year, sending up a dense group of new shoots in late spring that quickly develop into a 6-8ft shrub. In warmer zones, it can reach a height of 10'. It has a light scent which attracts butterflies and bees. I'm not sure about hummingbirds, but possibly they are attracted to this plant, too.


On Jul 8, 2004, foxygardener from Kyle, TX wrote:

Two of these plants have been growing on my family property in Uhland, Tx, just ne of San Marcos, Tx, for at least 30 years. They are at least 12-14' high and bloom beautifully each spring until the early part of June. The blooms are a beautiful filler in rose bouquets! We never do anything to the bushes, except enjoy the flowers and the fragrance.


On Apr 14, 2004, langbr from Olathe, KS (Zone 6a) wrote:

Love this bush. Trim it back every spring and it's soon 4-foot tall and wide again! Profuse bloomer, butterfly and bee attracter, and gorgeous for cut flowers. Extremely hardy - I'm Zone 5b and it does fine in Zone 5.