Q.Why Do Sections Of My Caryopteris Die Back Over The Winter.
The die back occurs most winters, sometimes as much as 3/4 of the bush. I cut the dead out and by late summer It has filled out and bloomed. It gets about 6 -7 hours of sun and is in a border planting with larger shrubs behind it. I do not water it. We generally get adequate rainfall. It’s ugly in the spring and beautiful by September.
Certified GKH Gardening Expert
This is normal behavior from the shrub. Here is an article with more information: