Botanical Name: Robinia x ambigua 'Decaisneana'
Common Name: Light Pink Locust  
Plant photo of: Robinia x ambigua 'Decaisneana'
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Water Saving Tip:

Fix leaking sprinklers, valves, and pipes.

One broken spray sprinkler can waste 10 gallons per minute - or 100 gallons in a typical 10 minute watering cycle.

  • Anatomy

  • Culture

  • Design

Plant Type



Height Range



Flower Color

Pink, Purple


Flower Season

Spring, Summer


Leaf Color



Bark Color



Fruit Color



Fruit Season

Fall, Persistent







Growth Rate

Fast, Moderate


Soil Type

Sandy, Clay, Loam, Rocky, Unparticular


Soil Condition

Average, Rich, Poor, Well-drained, Dry


Soil pH

Neutral, Basic


Adverse Factors


Design Styles

English Cottage, Mediterranean, Ranch, Spanish, Woodland


Accenting Features

Showy Flowers, Specimen


Seasonal Interest

Spring, Summer


Location Uses

Background, Park, Street Tree


Special Uses

Shade Tree


Attracts Wildlife


Information by: Stephanie Duer
Photographer: GardenSoft
  • Description

  • Notes

This vigorous tree grows 40 to 50 feet tall and 20 to 30 feet wide, and provides 6 inch long clusters of soft-pink flowers in late spring. Wide-spreading light summer shade for very little care; a tough & adaptable tree. Light Pink Locust has smaller thorns than other locust, but it is not without them. Because of compound leaves, shade is filtered and dappled.
Extremely adaptable to varied soils and conditions; will grow practically anywhere but in wet soils. Tolerant of dry conditions and saline soils. It requires full sun, low watering (drought tolerant), and will live in poor soil.