Posted: 12/05/2014 at 17:24
Crikey....another Box problem.
I've said it so many times, I'm starting to bore myself ......don't trim your Box until Derby Day (usually the first week in June)
I agree with BB, it looks like frost damage and they should recover, although the open cuts do leave them open to box blight at a later stage.....as a certain well known TV garden presenter has found.
You've done nothing wrong at all CJ. The people responsible are the people who supplied the market stall holder, after all, they've nothing to lose once they have their money and they do look more saleable when neatly trimmed.
For me, I would live with them for another month when the risk of frost (hopefully) has past, then trim them back to, but not into dark green leaves.
If necessary they can be trimmed again in September, just keep well outside the frost season.