Our False Acacia has not flowered properly this year. Leave have only formed from the ground upwards to about 18 inches. No problems last year or the year before. No proper buds seemed to have formed on the upper branches.
How long has the tree been in? The Robinia Pseudoacacia 'frisia' doesnt like being moved to a new home. On the plus side it is such a quick grower, that you may well be better off training a new shoot up and virtually starting a new tree.