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PlantFiles: Yellow False Acacia, Black Locust, Yellow Locust
Robinia pseudoacacia 'Purple Robe'

 
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Family: Papilionaceae (pa-pil-ee-uh-NAY-see-ee) (Info)
Genus: Robinia (roh-BIN-ee-uh) (Info)
Species: pseudoacacia (soo-doh-a-KAY-see-uh) (Info)
Cultivar: Purple Robe

2 vendors have this plant for sale.

2 members have or want this plant for trade.

Category:
Trees

Height:
30-40 ft. (9-12 m)
over 40 ft. (12 m)

Spacing:
20-30 ft. (6-9 m)

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)
USDA Zone 9b: to -3.8 °C (25 °F)

Sun Exposure:
Full Sun

Danger:
Seed is poisonous if ingested
Parts of plant are poisonous if ingested

Bloom Color:
Pink

Bloom Time:
Late Spring/Early Summer

Foliage:
Grown for foliage
Deciduous
Smooth-Textured

Other details:
This plant is attractive to bees, butterflies and/or birds
Flowers are fragrant

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:
Non-patented

Propagation Methods:
From hardwood cuttings
From seed; direct sow outdoors in fall

Seed Collecting:
Allow pods to dry on plant; break open to collect seeds
Seed does not store well; sow as soon as possible

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Thumbnail #1 of Robinia pseudoacacia by stressbaby

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Profile:

1 positive
1 neutral
3 negatives

Gardeners' Notes:

RatingAuthorComment
Negative distantkin On Mar 15, 2008, distantkin from Saint Cloud, MN (Zone 4b) wrote:

Black locust (Robinia pseudoacacia) is considered invasive by the Minnesota DNR
"Ecological Threat:

* Invades primarily disturbed habitats, degraded wood, thickets and old fields crowding out native vegetation of prairies, oak savannas and upland forests, forming single species stands.
* It reproduces vigorously by root suckering and stump sprouting forming a common connecting root system.
* It is native to the U.S. and occurs naturally on the lower Appalachian mountain slopes. It has been extensively planted for its nitrogen-fixing qualities and its hard wood."

Neutral lyndy_1 On Aug 2, 2007, lyndy_1 from Kearny, AZ wrote:

We first saw this plant at Superstition Springs Mall in Mesa AZ. Trees line the lanes throughout the parking areas. I saw clusters of the seeds and grabbed a few to try. I've had the pink honey locust trees in CA. I'm going to plant the seeds and see what happens. We live East of Mesa, In Kearny. Wish me luck!

Negative cactuspatch On Jul 11, 2007, cactuspatch from La Luz/Alamogordo, NM (Zone 7b) wrote:

This tree is really pretty when in bloom. However the scent is strong and I am highly allergic to it. It was a bit fragile and was topped by a high wind, which caused it to die. Even though we dug it out 2 years ago, I am constantly cutting off the new shoots it is sending up, apparently from the roots that weren't dead? I would never plant this tree again. One short season of beautiful blooms is not work all the trouble it has caused. I now have a beautiful crepe myrtle in its place, long beautiful bloom, no disgusting scent to cause headaches for weeks, and no plants coming up all over the place.

Positive Bledsoe On Mar 16, 2007, Bledsoe from Fort Collins, CO wrote:

Although suckering, and water spouts do frequently happen to this tree, it's absolutely a beautiful tree when flowers are in bloom. This tree can also be grown where most trees can't grow. Also when full grown has a great canvas

Negative Dianesgarden On Oct 24, 2005, Dianesgarden from Walnut Creek, CA wrote:

This cultivar is invasive, sending out additional underground shoots every year. These shoots grow into new trees and are resistant to pruning at ground level or digging up.

Regional...

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

Kearny, Arizona
Prescott, Arizona
Arcata, California
Banning, California
Chowchilla, California
Felton, California
Redlands, California
Simi Valley, California
Walnut Creek, California
Denver, Colorado
Fort Collins, Colorado
Stephenson, Michigan
La Luz, New Mexico
Roswell, New Mexico
Hereford, Texas
Ivins, Utah
Lexington, Virginia



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