Photo by Melody

PlantFiles: American Wisteria
Wisteria macrostachya 'Blue Moon'

Family: Papilionaceae (pa-pil-ee-uh-NAY-see-ee) (Info)
Genus: Wisteria (wis-TEER-ee-uh) (Info)
Species: macrostachya (mak-ro-STAK-yuh) (Info)
Cultivar: Blue Moon

5 vendors have this plant for sale.

12 members have or want this plant for trade.

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8-10 ft. (2.4-3 m)

4-6 ft. (1.2-1.8 m)

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)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:
Sun to Partial Shade

Seed is poisonous if ingested
All parts of plant are poisonous if ingested

Bloom Color:

Bloom Time:
Mid Summer


Other details:
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:
Unknown - Tell us

Propagation Methods:
From leaf cuttings
By grafting
By simple layering

Seed Collecting:
Allow pods to dry on plant; break open to collect seeds

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1 positive
3 neutrals
No negatives

Gardeners' Notes:

Neutral coriaceous On Feb 12, 2014, coriaceous from ROSLINDALE, MA wrote:

I have mixed feelings about this plant.

I tried it because authoritative sources claimed it was less aggressive than the more commonly grown Asian species. I planted an 18" rooted cutting in May. Sixteen months later it hit the roofline of a two-story building, and it hasn't slowed down since. It has required just as much pruning as the Asian species. I'm always ripping out basal runners that race across the ground and root at every node. Also it self-sows vigorously despite my attempts at deadheading. It requires a big strong support because it eventually can grow just as tall and as heavy as the Asian species.

It began blooming in its second year. Flower clusters are almost as long as with Chinese wisteria, and the flowers are a bit smaller, though still showy. Bloom happens shortly after the plant leafs out, so the flowers don't make quite as much impact as with the precocious Asian species. I've observed some sporadic late-season repeat bloom.

Flower buds are said to be hardy to Z3-4, substantially hardier than with the Asian species. Also, this plant grows naturally on the edges of swamps and bayous and is said to be much more tolerant of wet or poorly drained soils.

So there are situations where this plant may be more useful than the Asian species. But don't expect it to involve any less maintenance work.

Dirr lists a W. sinensis cultivar named 'Blue Moon'. Either that's an error or there are two different cultivars with the same name in the same genus.

Neutral flowers4birds On Jan 24, 2013, flowers4birds from Chilton, WI (Zone 5b) wrote:

local deer pruned my 2 yr. old plant severely multiple times weeks apart; not too poison for them.

Neutral Marlina On Jul 26, 2009, Marlina from Blaine, MN (Zone 4b) wrote:

My husband just loves this plant. I am not as crazy it has big pea pod type seeds that pop all over and you have to constantly keep it growing where you want so it doesn't destroy trees or roofs. Also if you don't like bees we had a huge crop when they bloom. All in all I guess if it was like the honeysuckle vine and drew the hummers I would love it,but unfortunately it doesn't.

Positive KSBaptisia On Jun 8, 2009, KSBaptisia from Beatrice, NE (Zone 5b) wrote:

Beautiful cultivar of the native species of Wisteria and great substitute for the highly invasive Chinese and Japanese versions.


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

Rensselaer, Indiana
Kalona, Iowa
Alexandria, Louisiana
Roslindale, Massachusetts
Allen Park, Michigan
Minneapolis, Minnesota (2 reports)
Saint Paul, Minnesota
Beatrice, Nebraska
Elizabeth City, North Carolina
Knoxville, Tennessee

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