Posted: 12/05/2014 at 07:35
I'm afraid I'm stumped Sarah - that's a very rapid decline - I've been wracking my brain and looking stuff up but I can't think of anything that would affect it so quickly with no previous signs of anything being wrong and that wouldn't affect the plants around it.
Whereabouts are you - did you have a severe frost? But even then viburnums are pretty frost resistant and nothing else has been damaged
Which viburnum is it? I can't really tell from the pic
Hopefully someone with some ideas will come along soon ....