Answer: These trees usually bloom beginning at a young age and small size, so there may be an environmental or cultural problem. In some years, especially if the tree is in a frost pocket or exposed location, frosts or windy conditions may destroy the flower buds; sadly there is little the gardener can do to prevent that -- except relocate the plant.
Improperly timed pruning can remove flower buds; these trees require very little pruning and any discretionary pruning should be done in late spring only.
Finally, these plants do best in full sun or at least a half day of sun and prefer soil that is evenly moist yet well drained, meaning not soggy. Overly dry conditions or lack of sunlight could reduce blooming.
I hope this helps you trouble shoot.
Q&A Library Searching Tips