Answer: Hedges usually respond well to trimming and, while it may take a few weeks, new growth generally emerges wherever a stem is cut. I wonder if you pruned the plants back too severely? It's best to remove only the tip growth, on a regular basis, rather than wait until plants are quite overgrown and in need radical pruning. Leaves that were shaded from hot sunshine prior to pruning may be overexposed now and dying back because they can't adjust quickly enough to their new environment. Water regularly and wait until spring. If you need to trim the plants up a bit to encourage new growth, spring is the best time to do so. Best of luck!
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