some of our large box wood shrubs have turned yellow/gold on the tops and South sides
We want to trim it away, is it OK to do it now?
Certified GKH Gardening Expert
Yes, but you must also treat the underlying problem, or you may lose the shrub with just pruning alone.
This article will help you to correct the issue: https://www.gardeningknowhow.com/ornamental/shrubs/boxwood/yellow-or-brown-boxwoods.htm