underplanting hedge shrubs
I have asked for advice regarding photinia on occasions and am still trying to save a couple which are not as bushy as I'd like- been told pruning hard works but still hesitant as I may lose it (we live on top of a Yorkshire moor, though surrounded by other gardens so not as windy as it might be).
Can I undreplant with skimmia? I know the skimmia might take over but am ready for that... just wondered if it would get enough light (North-West facing)?
I will take the advice given if this is a stupid idea and don't mind being told so!