Plant, Tree & Shrub Library

Purple Robe Robinia

Robinia pseudoacacia 'Purple Robe'

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Purple Robe Robinia (Robinia pseudoacacia 'Purple Robe') at Bachman's Landscaping

Purple Robe Robinia flowers

Purple Robe Robinia flowers

(Photo courtesy of NetPS Plant Finder)

Purple Robe Robinia (Robinia pseudoacacia 'Purple Robe') at Bachman's Landscaping

Purple Robe Robinia in bloom

Purple Robe Robinia in bloom

(Photo courtesy of NetPS Plant Finder)

Height:  40 feet

Spread:  30 feet

Sunlight:  full sun 

Hardiness Zone:  4

Other Names:  Common Locust, Purple Robe Locust


A round-headed shade tree with highly fragrant and very attractive chains of deep pink flowers in spring; extremely adaptable, performs well in poor soils; more compact than the species, ideal as an accent tree for home landscapes

Ornamental Features

Purple Robe Robinia has chains of fragrant rose pea-like flowers with yellow eyes hanging below the branches in late spring. It has bluish-green foliage which emerges burgundy in spring. The oval pinnately compound leaves turn yellow in fall. The fruit is not ornamentally significant.

Landscape Attributes

Purple Robe Robinia is a deciduous tree with a strong central leader and a more or less rounded form. Its relatively fine texture sets it apart from other landscape plants with less refined foliage.

This is a high maintenance tree that will require regular care and upkeep, and is best pruned in late winter once the threat of extreme cold has passed. Deer don't particularly care for this plant and will usually leave it alone in favor of tastier treats. Gardeners should be aware of the following characteristic(s) that may warrant special consideration;

  • Suckering
  • Insects
  • Spiny

Purple Robe Robinia is recommended for the following landscape applications;

  • Accent
  • Shade

Planting & Growing

Purple Robe Robinia will grow to be about 40 feet tall at maturity, with a spread of 30 feet. It has a low canopy with a typical clearance of 5 feet from the ground, and should not be planted underneath power lines. It grows at a fast rate, and under ideal conditions can be expected to live for 60 years or more.

This tree should only be grown in full sunlight. It is very adaptable to both dry and moist growing conditions, but will not tolerate any standing water. It is not particular as to soil type or pH, and is able to handle environmental salt. It is highly tolerant of urban pollution and will even thrive in inner city environments. This is a selection of a native North American species.

Hardiness Zone Plant Height Minimum Sunlight
Accent  Shade 
Flowers  Winter Value 
Ornamental Features