Purple Robe Locust Tree

About the Purple Robe Locust Tree

The Purple Robe Locust (Robinia pseudoacacia ‘Purple Robe’) is a stunning ornamental tree known for its spectacular pink-purple blooms in spring. These fragrant, wisteria-like flowers can reach up to eight inches long, covering the canopy in a dramatic, eye-catching display.

Also called the Purple Robe Black Locust, this cultivar of the native black locust is not only beautiful—it’s also practical. A fast-growing shade tree, it’s ideal for landscapes, patios, decks, and streetscapes, offering a graceful structure and reliable seasonal interest.

Why Grow a Purple Robe Locust Tree?

• Spring Blooms: Masses of fragrant, dangling purple flowers that resemble wisteria
• Seasonal Color: Leaves emerge metallic red, turn blue-green in summer, and golden yellow in fall
• Winter Interest: Decorative seed pods remain on branches through the colder months
• Fast Growth: Grows 2–3 feet per year, reaching 30–40 feet tall at maturity
• Long-Lived: Can thrive for over 100 years
• Hardy and Adaptable: Tolerates drought once established and grows in a range of soils
• Versatile Landscape Uses: Works beautifully as a street tree, shade tree, or focal point in large spaces

You can even clip the spring blooms to enjoy indoors in fresh bouquets.

Additional Uses of the Purple Robe Locust

• Valuable to Beekeepers: Produces nectar used in acacia honey, which is highly prized for its clarity and flavor
• Hardwood Value: As a member of the black locust family, its dense wood is ideal for fence posts and makes excellent long-burning firewood

Growing Tips

The Purple Robe Locust is easy to grow and tolerant once established, but it does come with a few considerations:

• Sunlight: Prefers full sun, but tolerates partial shade
• Soil: Adaptable to various soil types, as long as they’re well-drained
• Drought Tolerance: Once mature, it requires little water
• Pruning: Prune in fall or winter to shape young trees and strengthen structure
• Watch for Root Suckers: This tree can spread by suckers—remove them early to prevent unwanted growth
• Pest Alert: May be affected by locust borer and other insect pests—inspect regularly for early signs

Plant a Purple Robe Locust Tree

Whether you’re drawn to its showy purple flowers, its value to pollinators, or its ability to provide fast-growing shade, the Purple Robe Locust is a standout. With year-round beauty and a long lifespan, it’s a tree that gives back to your landscape for decades.

Buy Purple Robe Locust trees today to enjoy their stunning spring display and low-maintenance charm.