Why would a 3 year old Locust (Purple Robed) loose 100 % of its leaves in the spring/summer and then start all over with new sprouts?
I have 4 young locust trees all the same age and treated the same. One lost all its leaves and I thought it had died for some reason. Then it started sprouting all new leaves and appears fine?
Some type of physiological stress like water deficit could be the cause.