Wisteria, Double Japanese Wisteria 'Violacea Plena'

Wisteria floribunda

Family: Fabaceae (fab-AY-see-ee) (Info)
Genus: Wisteria (wis-TEER-ee-uh) (Info)
Species: floribunda (flor-ih-BUN-duh) (Info)
Cultivar: Violacea Plena
Additional cultivar information:(aka Black Dragon)



Vines and Climbers

Water Requirements:

Drought-tolerant; suitable for xeriscaping

Average Water Needs; Water regularly; do not overwater

Sun Exposure:

Full Sun




Provides Winter Interest

Foliage Color:

Unknown - Tell us


15-20 ft. (4.7-6 m)

20-30 ft. (6-9 m)

30-40 ft. (9-12 m)


20-30 ft. (6-9 m)

30-40 ft. (9-12 m)


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)

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

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

Where to Grow:

Unknown - Tell us


All parts of plant are poisonous if ingested

Bloom Color:


Medium Purple

Dark Purple/Black

Bloom Characteristics:

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

Flowers are fragrant

Bloom Size:

Unknown - Tell us

Bloom Time:

Mid Spring

Other details:

May be a noxious weed or invasive

Soil pH requirements:

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:

Unknown - Tell us

Propagation Methods:

From semi-hardwood cuttings

From hardwood cuttings

From seed; direct sow outdoors in fall

By grafting

By simple layering

Self-sows freely; deadhead if you do not want volunteer seedlings next season

Seed Collecting:

Allow pods to dry on plant; break open to collect seeds

Seed does not store well; sow as soon as possible


This plant is said to grow outdoors in the following regions:

San Leandro, California

Monroe, Louisiana

Gardeners' Notes:


On Apr 15, 2003, Lucia from Rio de Janeiro,
Brazil (Zone 10a) wrote:

I have never seen anything so beautiful!!!!
I wish I could find the plant or seeds in my country.


On Apr 14, 2003, Kell from (Zone 9b) wrote:

This is my favorite of all the wisterias I have seen. The racemes are very full and have a combination of rich colors which make it stunning. It starts a deep purple, the darkest of all the cultivars and lightens up slightly as time goes by. There is also a lot of mauve in it. According to Peter Valder, ( author of Wisterias), this is the only double known. There has been some disagreement on this but Mr. Valder feels the difference in color is due to cultural conditions not to there being different cultivars. It is also know for its fall color, a clear yellow. Again considered the best for fall color. It is known to be difficult to get to bloom early in its life though it is as floriferous as any other if grown in full sun and pruned correctly.