Japanese Wisteria, Kyushaku Wisteria
Wisteria floribunda 'Longissima'

Family: Papilionaceae (pa-pil-ee-uh-NAY-see-ee) (Info)
Genus: Wisteria (wis-TEER-ee-uh) (Info)
Species: floribunda (flor-ih-BUN-duh) (Info)
Cultivar: Longissima
Additional cultivar information:(aka Macrobotrys, Multijuga, Murasaki Naga Fuji, Naga Noda, Purple Patches)

Category:

Vines and Climbers

Height:

15-20 ft. (4.7-6 m)

20-30 ft. (6-9 m)

Spacing:

Unknown - Tell us

Hardiness:

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)

Sun Exposure:

Full Sun

Danger:

All parts of plant are poisonous if ingested

Bloom Color:

Violet/Lavender

Bloom Time:

Mid Spring

Foliage:

Deciduous

Other details:

Flowers are fragrant

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

Patent Information:

Non-patented

Propagation Methods:

From seed; winter sow in vented containers, coldframe or unheated greenhouse

From seed; sow indoors before last frost

Seed Collecting:

Allow seedheads to dry on plants; remove and collect seeds

Regional

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

,

Tucson, Arizona

Brea, California

Sacramento, California

Spring Valley, California

Carrollton, Georgia

Wyanet, Illinois

Cambridge, Massachusetts

show all

Gardeners' Notes:

2
positives
0
neutrals
2
negatives
RatingContent
Positive

On Jan 18, 2015, sladeofsky from Louisville, KY (Zone 6b) wrote:

This selection has the longest flower clusters of all, up to 3 (some claim 4) feet. The length is variable however, nonetheless still larger than other Wisterias.

Negative

On Dec 22, 2014, pmehring from Charlottesville, VA wrote:

Japanese Wisteria is extremely invasive in our area. We have seen it pull down large trees. We suggest checking your state's invasive plants list before planting Wisteria. We have had some success trying to eliminate it by cutting the vines and runners close to the ground and treating them with glyphosate solution. Be aware that wind can spread the seeds far from the parent plant. The twenty foot long runners also can spread the vine quickly.

Negative

On Oct 23, 2011, BotanicalBoi from Carrollton, GA (Zone 7b) wrote:

This plant, while beautiful and with great smell has taken over a better part of my garden. It is impossible to get rid of. I have even used brush clearer with no luck. Please be careful unless you want this EVERYWHERE!

Positive

On Oct 1, 2003, cernunose wrote:

have had this species for some time now and i adore it ! absolutely gorgeous plant if you dont mind training and caring for a fairly fast growing plant.

the wisteria propagates by thier roots.
they branch out underground and after a while rise up and begin to form,
to produce new plants from an old one simply cut a 6-whatever inch section of a set of roots that has started to sprout and already has its first leaves, then plant:)