The Q&A Archives: Locust Tree

Question: What does the locust tree with purple flowers look like?

Answer: Locust tree leaves are divided like feathers into many roundish leaflets, with clusters of sweet pea-shaped flowers in mid-spring. The trees are fairly fast growing. The purple flowering kind is 'Robinia ambigua', (Idaho Locust). It has bright magenta-rose flowers in 8" inch clusters.

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