Purple Robe Black Locust

 Purple Robe Black Locust
 Purple Robe Black Locust
 Purple Robe Black Locust
 Purple Robe Black Locust
 Purple Robe Black Locust
 Purple Robe Black Locust
 Purple Robe Black Locust
 Purple Robe Black Locust

Common Names

  • Purple Robe

Scientific Names

  • Robinia pseudoacacia 'Purple Robe'
  • Fabaceae (Pea family)
Basic Landscape Attributes
Height Range: 
30-40 ft. height
Fall Colors: 
Yellow/gold in fall
Width Range: 
20-30 ft. spread, Fast-growing and easy to grow
Flower Type: 
Fragrant, light purple, Wisteria-like flower clusters
Shape: 
Round shape

History of
the Tree Species

  • Appears to be the result of intentional hybridization by William Silve between R. ambigua 'Decaisneana' and R. hispida 'Monument'.
  • Plant patent (PP2454) granted in 1964.

Basic Growing Conditions

  • Full sun to partial shade
  • Widely adaptable to varying moisture and soil conditions
  • Prefers average to drier soil
  • Tolerates clay, salt, and drought
 Purple Robe Black Locust
 Purple Robe Black Locust

Scientific Facts

  • Used to provide shade
  • Some have thorns. Others are thornless
  • Not edible -- bark, leaves, and seeds are toxic
  • Wood is among the most durable in North America, so heavily farmed
  • In India, different parts of black locust used in traditional medicine as a laxative, antispasmodic, and diuretic
  • In Romania, flowers sometimes used to create a sweet, fragrant jam

Location on tree on Shelby Ave: