I have a mature coral tree that for the first time ever failed to bloom and then had no regrowth of any leaves- It's February and just bare branches. Other local trees all look healthy. We live in farmland, and it's surrounded by a viburnum hedge.
Certified GKH Gardening Expert
Depending on where you live, the coral tree could have been damaged by cold during the winter if it is less winter-hardy than most other trees in your area. Or, it could just be late in leafing out this year- see the following article:
Another possibility is that a disease or heavy insect infestation has damaged or killed your tree. Did you notice any unusual insect damage or leaf loss last year? Please see the links on the right side of the following page for some diseases and insect pests that may be a problem. Verticillium wilt is a possibility, because it can kill whole trees: