underplanting hedge shrubs

catnip

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!

Ta, Catnip 

Fairygirl

I'd reckon the Photinias won't be happy in the site you have unless they have lots of protection and good free draining soil - it's what they seem to prefer in general. Skimmias on the other hand, like some shade and damper soil so they should be perfectly happy. Neutral to acidic soil is what they need though.

catnip

Thanks! Will have to replace them, I think... Always hard to do!