If your answer to Daisy's question is no leaves, my answer will not apply!
But if you have leaves and you are waiting on flowers some varieties do not bloom until almost July. If you see any small green balls on the tips that would be blooms forming. If no green balls but you have leaves, then are the trunks and wood tan or grey? Or are they sooty like charcoal coloring in spots? And if you go up to the wood do you see lots of individual white flecks about the size of a sharpened pencil lead? If yes they have the scale that has been affecting crepes recently. They would need a systemic. They may still flower this year but late because of the scale. Although you see the scale on trunks and branches it gets all the way in the tips and will get worse with time. I treated mine once and thought it would be a yearly thing, but it has been fine the last two years. I believe it is too late to treat now, you might be able to in fall. Hopefully you have leaves and it is a July blooming variety. A picture would be helpful.
