Repairing damaged hedge
We've inherited a hedge (pittosporum I think) that has been very badly damaged. We've been told that the previous owners set fire to it! Unfortunately, the dead wood has acted as the perfect framework for the ivy that grows rampantly locally. A lot of the hedge looks dead but there is regrowth in most places and in some parts it is quite healthy. The ivy has grown so thickly in places that the hedge has collapsed onto one side. Regrowth there is only at the very top and the hedge is still listing half over, even where I have removed the ivy.
My question is: should I leave it alone after removing the ivy or would it be better to cut those sections hard back? Unsurprisingly, the hedge was bone dry in the middle, so I'm not sure if exposure to light and rain will be enough to rejuvenate it.