Yellow False Acacia, Black Locust, Yellow Locust 'Lace Lady'

Robinia pseudoacacia

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: Lace Lady
Additional cultivar information:(PP9771; aka Twisty Baby)
Hybridized by Cunningham
Registered or introduced: 1996



Foliage Color:

Unknown - Tell us

Bloom Characteristics:

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

Flowers are fragrant

Water Requirements:

Drought-tolerant; suitable for xeriscaping

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


8-10 ft. (2.4-3 m)


10-12 ft. (3-3.6 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


Seed is poisonous if ingested

Parts of plant are poisonous if ingested

Plant has spines or sharp edges; use extreme caution when handling

Bloom Color:

White/Near White

Bloom Time:

Late Spring/Early Summer


Grown for foliage



Provides winter interest

Other details:

Unknown - Tell us

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:


Propagation Methods:

Unknown - Tell us

Seed Collecting:

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed


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


Little Rock, Arkansas

Elk Grove, California

Pekin, Illinois

Saint Cloud, Minnesota

Kansas City, Missouri

Saint Louis, Missouri

Roundup, Montana

Clayton, North Carolina

Gibsonburg, Ohio

Hilliard, Ohio

Mill City, Oregon

Hummelstown, Pennsylvania

Port Angeles, Washington

show all

Gardeners' Notes:


On Jun 20, 2008, Sabrina1978 from Gibsonburg, OH wrote:

I do not believe this is the invasive one the previous poster mentioned. This is quite a smaller version and I believe that it is sterile. I have not had any suckers as of yet, I see that someone that posted pictures has. I love it so far, and I have had it over a year. I had it in a pot as a house plant for about 9 months and it is now in it's permanent residence in my yard. Bugs seem to like it very much however, and you do have to prune quite often to keep it's shape. It may be a good tree for bonsai.

I have not had it flower yet, but it is small and I did keep it as a houseplant for a stretch as I mentioned before. I will update with any pertinent information.


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."