This winter was unusually cold and deep snow. The one nearest the road appears to have suffered the most and has a significant amount of dead leaves. Is it better to trim the dead area now, or wait until the fall?
Spring Pruning Winter Damage of Rhododendron
Certified GKH Gardening Expert
I would go ahead and prune the dead or damaged areas of your rhododendron now.
Here are some articles that will help you:
Pruning winter damaged shrubs:
How to prune rhododendrons: