Robinia pseudoacacia

  • BOTANICAL NAME: Robinia pseudoacacia
  • COMMON NAME: Black Locust
  • FAMILY: Fabaceae
  • NATIVITY: New Jersey to Florida to Arkansas
  • GROWTH HABIT:  30-50’ (90’); Tall, suckers everywhere, strong plant.
  • HARDINESS:  USDA Zone 4 to 8 (9)
  • OPTIMUM GROWING CONDITIONS:  Open woods and drier soils and full sun.
  • SUCCESSIONAL STATUS:  Successional
  • FACULTATIVE STATUS:  Facultative Upland
  • LANDSCAPE VALUE:  Grows well in desolate areas and often admired for the white fragrant flowers.
  • FOLIAGE:   Alternate, pinnately compound and entire.  Bright to dark green and rounded leaflets.
  • BUDS:  Small, 3 to 4 usually close together in clusters.
  • BARK:  Very often twisted bark, dark gray in color and deeply furrowed.  Paired stipular spines throughout the stems.
  • FRUIT:  Flat black pod.  Flowers are extremely fragrant and white, blooming in late spring.
  • PESTS:  Canker, leaf spots, but none serious.
University of Delaware

University of Delaware Botanic GardensNewark, DE 19716Phone: 302 831-0153