In Stock
Purple Robe Black Locust
Robinia pseudoacacia 'Purple Robe'
Black Locust
In stock · from $362.99
A fast-growing tree with upright arching branches and a rounded crown. Masses of pendulous clusters of purple to rose-pink flowers appear in the late spring, which give way to persistent seed pods. Compound green leaves turn pale yellow in the fall before lightly dropping to the ground and blowing away. Grows in hot dry climates and adapts well to urban conditions and poor soils. Can be prone to diseases and have weak wood. Seed pods are toxic.
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Plant facts
Sizes and prices
Retail prices; trade pricing for wholesale accounts. Availability updates hourly; stock last changed 2026-09-28.
Good to know
- Suitable for Utah Lake secondary water systems.
Quick answers
How big does Purple Robe Black Locust get?
About 40' tall and 35' wide at maturity.
How much sun does Purple Robe Black Locust need?
Full Sun (6+ hours).
How much water does Purple Robe Black Locust need?
Moderate water use.
Will Purple Robe Black Locust grow in Utah and the Intermountain West?
It is rated hardy to USDA zone 4, so it suits sites in zone 4 or warmer, which covers most of the region. The Salt Lake Valley floor is mostly zone 7; benches, mountain valleys and high plains in Utah, Idaho, Montana, Colorado and Wyoming are colder, often zones 3–6, so check the zone for your site.
Where can I buy Purple Robe Black Locust in Utah?
Progressive Plants in Copperton, Utah has it in stock, from $362.99. Homeowners can order online for pickup at the farm or local delivery; landscape contractors can have it shipped across Utah, Idaho, Montana, Colorado, Wyoming and Nevada.
Can landscape contractors buy Purple Robe Black Locust wholesale?
Yes. Landscape contractors and architects with a Progressive Plants wholesale account get trade pricing, bulk ordering and shipping across Utah, Idaho, Montana, Colorado, Wyoming and Nevada on our own trucks or by freight ($1,500 minimum outside our local delivery area). Apply at progressiveplants.com/wholesaleapp.html or call 801-565-7333.