Posted: 24/05/2017 at 12:48
Although we'reinclined to think they're evergreen, they aren't. Have you got some of the yellow variety in there? It's less robust anyway. They thrive on plenty of water, so if you've experienced the drier spells thathave been present recently, it may just need a good drink.
Tidy the excess leaves away, and drench it, add a little general fertiliser, and mulch it with something to help retain the moisture.
When you trim, try and keep the bottom of the hedge a little wider than the top too. The bottoms of stems can get shaded out a bit if the hedge is too upright.