Idaho Locust is a medium sized tree that grows to about 40 feet tall and 15 to 20 feet wide. Small, light green pinnate leaves turn yellow in autumn. 6 to 8 inch long pendents of rose-pink, fragrant flowers bloom in spring. Idaho Locust has a more open habit than Black Locust, and it has few or no seed pods, but it does have thorns.
Grows best in full sun in well drained soil, though it will tolerate part sun situations. Tolerates high temperatures, poor soils, nitrogen-poor soils, and high pH. It does have a history of breakage in snow storm events in SLC.